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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.2008.2 linux security update 11 June 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: linux kernel Publisher: Debian Operating System: Debian GNU/Linux 8 Debian GNU/Linux 9 Debian GNU/Linux 10 Impact/Access: Root Compromise -- Existing Account Execute Arbitrary Code/Commands -- Remote with User Interaction Access Privileged Data -- Existing Account Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2020-13143 CVE-2020-12826 CVE-2020-12770 CVE-2020-12769 CVE-2020-12768 CVE-2020-12654 CVE-2020-12653 CVE-2020-12652 CVE-2020-12464 CVE-2020-12114 CVE-2020-11668 CVE-2020-11609 CVE-2020-11608 CVE-2020-11565 CVE-2020-11494 CVE-2020-10942 CVE-2020-10757 CVE-2020-10751 CVE-2020-10732 CVE-2020-10711 CVE-2020-10690 CVE-2020-9383 CVE-2020-8649 CVE-2020-8648 CVE-2020-8647 CVE-2020-8428 CVE-2020-2732 CVE-2020-1749 CVE-2020-0543 CVE-2020-0009 CVE-2019-20811 CVE-2019-20806 CVE-2019-20636 CVE-2019-19768 CVE-2019-19462 CVE-2019-19447 CVE-2019-19319 CVE-2019-5108 CVE-2019-3016 CVE-2019-2182 CVE-2018-14613 CVE-2018-14612 CVE-2018-14611 CVE-2018-14610 CVE-2015-8839 Reference: ASB-2020.0002 ASB-2016.0089 ESB-2020.2003 ESB-2020.1853 Original Bulletin: http://www.debian.org/security/2020/dsa-4699 https://www.debian.org/security/2020/dsa-4698 https://www.debian.org/lts/security/2020/dla-2241 https://www.debian.org/lts/security/2020/dla-2241-2 Comment: This bulletin contains three (3) Debian security advisories. Revision History: June 11 2020: Vendor updated advisory dla-2241 to dla-2241-2 June 10 2020: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - - ------------------------------------------------------------------------- Debian Security Advisory DSA-4699-1 security@debian.org https://www.debian.org/security/ Ben Hutchings June 09, 2020 https://www.debian.org/security/faq - - ------------------------------------------------------------------------- Package : linux CVE ID : CVE-2019-3016 CVE-2019-19462 CVE-2020-0543 CVE-2020-10711 CVE-2020-10732 CVE-2020-10751 CVE-2020-10757 CVE-2020-12114 CVE-2020-12464 CVE-2020-12768 CVE-2020-12770 CVE-2020-13143 Debian Bug : 960271 Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2019-3016 It was discovered that the KVM implementation for x86 did not always perform TLB flushes when needed, if the paravirtualised TLB flush feature was enabled. This could lead to disclosure of sensitive information within a guest VM. CVE-2019-19462 The syzkaller tool found a missing error check in the 'relay' library used to implement various files under debugfs. A local user permitted to access debugfs could use this to cause a denial of service (crash) or possibly for privilege escalation. CVE-2020-0543 Researchers at VU Amsterdam discovered that on some Intel CPUs supporting the RDRAND and RDSEED instructions, part of a random value generated by these instructions may be used in a later speculative execution on any core of the same physical CPU. Depending on how these instructions are used by applications, a local user or VM guest could use this to obtain sensitive information such as cryptographic keys from other users or VMs. This vulnerability can be mitigated by a microcode update, either as part of system firmware (BIOS) or through the intel-microcode package in Debian's non-free archive section. This kernel update only provides reporting of the vulnerability and the option to disable the mitigation if it is not needed. CVE-2020-10711 Matthew Sheets reported NULL pointer dereference issues in the SELinux subsystem while receiving CIPSO packet with null category. A remote attacker can take advantage of this flaw to cause a denial of service (crash). Note that this issue does not affect the binary packages distributed in Debian as CONFIG_NETLABEL is not enabled. CVE-2020-10732 An information leak of kernel private memory to userspace was found in the kernel's implementation of core dumping userspace processes. CVE-2020-10751 Dmitry Vyukov reported that the SELinux subsystem did not properly handle validating multiple messages, which could allow a privileged attacker to bypass SELinux netlink restrictions. CVE-2020-10757 Fan Yang reported a flaw in the way mremap handled DAX hugepages, allowing a local user to escalate their privileges. CVE-2020-12114 Piotr Krysiuk discovered a race condition between the umount and pivot_root operations in the filesystem core (vfs). A local user with the CAP_SYS_ADMIN capability in any user namespace could use this to cause a denial of service (crash). CVE-2020-12464 Kyungtae Kim reported a race condition in the USB core that can result in a use-after-free. It is not clear how this can be exploited, but it could result in a denial of service (crash or memory corruption) or privilege escalation. CVE-2020-12768 A bug was discovered in the KVM implementation for AMD processors, which could result in a memory leak. The security impact of this is unclear. CVE-2020-12770 It was discovered that the sg (SCSI generic) driver did not correctly release internal resources in a particular error case. A local user permitted to access an sg device could possibly use this to cause a denial of service (resource exhaustion). CVE-2020-13143 Kyungtae Kim reported a potential heap out-of-bounds write in the USB gadget subsystem. A local user permitted to write to the gadget configuration filesystem could use this to cause a denial of service (crash or memory corruption) or potentially for privilege escalation. For the stable distribution (buster), these problems have been fixed in version 4.19.118-2+deb10u1. This version also fixes some related bugs that do not have their own CVE IDs, and a regression in the <linux/swab.h> UAPI header introduced in the previous point release (bug #960271). We recommend that you upgrade your linux packages. For the detailed security status of linux please refer to its security tracker page at: https://security-tracker.debian.org/tracker/linux Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/ Mailing list: debian-security-announce@lists.debian.org - -----BEGIN PGP SIGNATURE----- iQKTBAEBCgB9FiEERkRAmAjBceBVMd3uBUy48xNDz0QFAl7f5cVfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldDQ2 NDQ0MDk4MDhDMTcxRTA1NTMxRERFRTA1NENCOEYzMTM0M0NGNDQACgkQBUy48xND z0Q2Gg//b/hL9fW9Js1PYDU/VtS6r5Cca5xsCYlbAheAlMPMtm/Vym4NJOuEvyuI DvPXbf0Bi7gjQ0gEgM/urJTzqjzIccwrUQe1aFHt0N9exC53z1xPWZDJepGkSQOB 2AB5YaFTxkuGur/HXbKomdMWvSVphpBM+id9v2V1iWY2iA6cI1sCjgziUKcDMECD T7tCe4Hrjf6BY/W4xBiT0BEQNOO2i/rn7p9pNk+wi85BbC7g5ubKWGn9sSDd8KtA u2z5tsicaM7kXaPsaW11fSPxu7YOz09qLgBQnY8B2gdMEAp3YjN9ibyHppjme3GK 02ZZUHQ+Y4MyQQgCzWxaqXCu6Aa+4B5i2nTY907BVBslrfulKRbr1qS3D2CJojT/ qYVub7C5RCW5VnbJZxCDLgSmGRbyPW2pVpnBTvID8czTUhd+M5e6fW932TzUW07w 18ueto1fRlcAauIO3SQV7Ai9froFGjH4L8XbUipiv0qwotSjcPb4HoZpp0xgNcRU xjZW0MMhK/lyfe8gDx8wjpihbQVKtTtIaWbeoZPoMENE92yW8+7DbXjfXAylX3px IdVaeo7iF3MOYuez4qEAsyPF4ver8Xl9HKS05J9NUYUeRf2BF3M6xFWjpTm5xjoH bdIGBJ322sNjTAzkneriX5iO3szBDINPHII2V/AaqafhYZYWtoM= =c00Y - -----END PGP SIGNATURE----- - -------------------------------------------------------------------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - - ------------------------------------------------------------------------- Debian Security Advisory DSA-4698-1 security@debian.org https://www.debian.org/security/ Ben Hutchings June 09, 2020 https://www.debian.org/security/faq - - ------------------------------------------------------------------------- Package : linux CVE ID : CVE-2019-2182 CVE-2019-5108 CVE-2019-19319 CVE-2019-19462 CVE-2019-19768 CVE-2019-20806 CVE-2019-20811 CVE-2020-0543 CVE-2020-2732 CVE-2020-8428 CVE-2020-8647 CVE-2020-8648 CVE-2020-8649 CVE-2020-9383 CVE-2020-10711 CVE-2020-10732 CVE-2020-10751 CVE-2020-10757 CVE-2020-10942 CVE-2020-11494 CVE-2020-11565 CVE-2020-11608 CVE-2020-11609 CVE-2020-11668 CVE-2020-12114 CVE-2020-12464 CVE-2020-12652 CVE-2020-12653 CVE-2020-12654 CVE-2020-12770 CVE-2020-13143 Debian Bug : 952660 Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2019-2182 Hanjun Guo and Lei Li reported a race condition in the arm64 virtual memory management code, which could lead to an information disclosure, denial of service (crash), or possibly privilege escalation. CVE-2019-5108 Mitchell Frank of Cisco discovered that when the IEEE 802.11 (WiFi) stack was used in AP mode with roaming, it would trigger roaming for a newly associated station before the station was authenticated. An attacker within range of the AP could use this to cause a denial of service, either by filling up a switching table or by redirecting traffic away from other stations. CVE-2019-19319 Jungyeon discovered that a crafted filesystem can cause the ext4 implementation to deallocate or reallocate journal blocks. A user permitted to mount filesystems could use this to cause a denial of service (crash), or possibly for privilege escalation. CVE-2019-19462 The syzbot tool found a missing error check in the 'relay' library used to implement various files under debugfs. A local user permitted to access debugfs could use this to cause a denial of service (crash) or possibly for privilege escalation. CVE-2019-19768 Tristan Madani reported a race condition in the blktrace debug facility that could result in a use-after-free. A local user able to trigger removal of block devices could possibly use this to cause a denial of service (crash) or for privilege escalation. CVE-2019-20806 A potential null pointer dereference was discovered in the tw5864 media driver. The security impact of this is unclear. CVE-2019-20811 The Hulk Robot tool found a reference-counting bug in an error path in the network subsystem. The security impact of this is unclear. CVE-2020-0543 Researchers at VU Amsterdam discovered that on some Intel CPUs supporting the RDRAND and RDSEED instructions, part of a random value generated by these instructions may be used in a later speculative execution on any core of the same physical CPU. Depending on how these instructions are used by applications, a local user or VM guest could use this to obtain sensitive information such as cryptographic keys from other users or VMs. This vulnerability can be mitigated by a microcode update, either as part of system firmware (BIOS) or through the intel-microcode package in Debian's non-free archive section. This kernel update only provides reporting of the vulnerability and the option to disable the mitigation if it is not needed. CVE-2020-2732 Paulo Bonzini discovered that the KVM implementation for Intel processors did not properly handle instruction emulation for L2 guests when nested virtualization is enabled. This could allow an L2 guest to cause privilege escalation, denial of service, or information leaks in the L1 guest. CVE-2020-8428 Al Viro discovered a potential use-after-free in the filesystem core (vfs). A local user could exploit this to cause a denial of service (crash) or possibly to obtain sensitive information from the kernel. CVE-2020-8647, CVE-2020-8649 The Hulk Robot tool found a potential MMIO out-of-bounds access in the vgacon driver. A local user permitted to access a virtual terminal (/dev/tty1 etc.) on a system using the vgacon driver could use this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2020-8648 The syzbot tool found a race condition in the the virtual terminal driver, which could result in a use-after-free. A local user permitted to access a virtual terminal could use this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2020-9383 Jordy Zomer reported an incorrect range check in the floppy driver which could lead to a static out-of-bounds access. A local user permitted to access a floppy drive could use this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2020-10711 Matthew Sheets reported NULL pointer dereference issues in the SELinux subsystem while receiving CIPSO packet with null category. A remote attacker can take advantage of this flaw to cause a denial of service (crash). Note that this issue does not affect the binary packages distributed in Debian as CONFIG_NETLABEL is not enabled. CVE-2020-10732 An information leak of kernel private memory to userspace was found in the kernel's implementation of core dumping userspace processes. CVE-2020-10751 Dmitry Vyukov reported that the SELinux subsystem did not properly handle validating multiple messages, which could allow a privileged attacker to bypass SELinux netlink restrictions. CVE-2020-10757 Fan Yang reported a flaw in the way mremap handled DAX hugepages, allowing a local user to escalate their privileges CVE-2020-10942 It was discovered that the vhost_net driver did not properly validate the type of sockets set as back-ends. A local user permitted to access /dev/vhost-net could use this to cause a stack corruption via crafted system calls, resulting in denial of service (crash) or possibly privilege escalation. CVE-2020-11494 It was discovered that the slcan (serial line CAN) network driver did not fully initialise CAN headers for received packets, resulting in an information leak from the kernel to user-space or over the CAN network. CVE-2020-11565 Entropy Moe reported that the shared memory filesystem (tmpfs) did not correctly handle an "mpol" mount option specifying an empty node list, leading to a stack-based out-of-bounds write. If user namespaces are enabled, a local user could use this to cause a denial of service (crash) or possibly for privilege escalation. CVE-2020-11608, CVE-2020-11609, CVE-2020-11668 It was discovered that the ov519, stv06xx, and xirlink_cit media drivers did not properly validate USB device descriptors. A physically present user with a specially constructed USB device could use this to cause a denial-of-service (crash) or possibly for privilege escalation. CVE-2020-12114 Piotr Krysiuk discovered a race condition between the umount and pivot_root operations in the filesystem core (vfs). A local user with the CAP_SYS_ADMIN capability in any user namespace could use this to cause a denial of service (crash). CVE-2020-12464 Kyungtae Kim reported a race condition in the USB core that can result in a use-after-free. It is not clear how this can be exploited, but it could result in a denial of service (crash or memory corruption) or privilege escalation. CVE-2020-12652 Tom Hatskevich reported a bug in the mptfusion storage drivers. An ioctl handler fetched a parameter from user memory twice, creating a race condition which could result in incorrect locking of internal data structures. A local user permitted to access /dev/mptctl could use this to cause a denial of service (crash or memory corruption) or for privilege escalation. CVE-2020-12653 It was discovered that the mwifiex WiFi driver did not sufficiently validate scan requests, resulting a potential heap buffer overflow. A local user with CAP_NET_ADMIN capability could use this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2020-12654 It was discovered that the mwifiex WiFi driver did not sufficiently validate WMM parameters received from an access point (AP), resulting a potential heap buffer overflow. A malicious AP could use this to cause a denial of service (crash or memory corruption) or possibly to execute code on a vulnerable system. CVE-2020-12770 It was discovered that the sg (SCSI generic) driver did not correctly release internal resources in a particular error case. A local user permitted to access an sg device could possibly use this to cause a denial of service (resource exhaustion). CVE-2020-13143 Kyungtae Kim reported a potential heap out-of-bounds write in the USB gadget subsystem. A local user permitted to write to the gadget configuration filesystem could use this to cause a denial of service (crash or memory corruption) or potentially for privilege escalation. For the oldstable distribution (stretch), these problems have been fixed in version 4.9.210-1+deb9u1. This version also fixes some related bugs that do not have their own CVE IDs, and a regression in the macvlan driver introduced in the previous point release (bug #952660). We recommend that you upgrade your linux packages. For the detailed security status of linux please refer to its security tracker page at: https://security-tracker.debian.org/tracker/linux Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/ Mailing list: debian-security-announce@lists.debian.org - -----BEGIN PGP SIGNATURE----- iQKTBAEBCgB9FiEERkRAmAjBceBVMd3uBUy48xNDz0QFAl7f5blfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldDQ2 NDQ0MDk4MDhDMTcxRTA1NTMxRERFRTA1NENCOEYzMTM0M0NGNDQACgkQBUy48xND z0Sh5RAAmfLUcD69AFSfY6hVPLCvTHS0gVYHUk57NSP7vHaUqQPWXMv4lV6pJ1sp I6sB7tuDW8MWERVy9lBuZrLhnhlhAfqhzkJ+F/yh6ze703QCf1mMoHBAI44yXGtB fZDV2vxreXpJ4LfoBfGP2+yFiJXBBCRASgyNEtiBoHYG0yt1gfqXP5OjlaRJ5p1I yElJ5Uj0MkclVj3nbupUmPs7V/2o4tPavOgTyLplTHTDfOMkK1Z86M0fUfh7fS97 ffwJutFObQuxrkO/2vtzTvaXPnqHh5DUIEQzq5xKhK10+GUlkppqHvId1c//0krF Wd1gZc2RXLkREQShh21BUaI2XxRTcOw7f6Nmz2QnwN/Q/dXGeWeCjPUGslna3BQs d/pToA0OpbFNxkNKsbg+ovzMrB9C9aP03aDpSztbf/ZLReR+yOf74s9ypdeadGLC qKmHcFRWP25ct/ZOxNnTquEwd2NT6qDc9Iu6VNdXb2ndRz1zFU/OZlZ3oEPkrCIp FxJ+j8jpMFJsluE09UjAxH4AhyNAPjPcCr3M+fkgG+WPgzxSHdKComDN06O53iVi kWbN/AQPXiLlWHuKpCWbS87dZUyT1K1Wf+7mJbsAUfrrd+1mgWSHTRw1QNii74CR bD91B+70LVu2UCKKxtnOIJ3+iUiUwBNPYw70B0cc3vZTv9O7q7k= =WzfN - -----END PGP SIGNATURE----- - -------------------------------------------------------------------------------- Package : linux Version : 3.16.84-1 CVE ID : CVE-2015-8839 CVE-2018-14610 CVE-2018-14611 CVE-2018-14612 CVE-2018-14613 CVE-2019-5108 CVE-2019-19319 CVE-2019-19447 CVE-2019-19768 CVE-2019-20636 CVE-2020-0009 CVE-2020-0543 CVE-2020-1749 CVE-2020-2732 CVE-2020-8647 CVE-2020-8648 CVE-2020-8649 CVE-2020-9383 CVE-2020-10690 CVE-2020-10751 CVE-2020-10942 CVE-2020-11494 CVE-2020-11565 CVE-2020-11608 CVE-2020-11609 CVE-2020-11668 CVE-2020-12114 CVE-2020-12464 CVE-2020-12652 CVE-2020-12653 CVE-2020-12654 CVE-2020-12769 CVE-2020-12770 CVE-2020-12826 CVE-2020-13143 This update is now available for all supported architectures. For reference the original advisory text follows. Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2015-8839 A race condition was found in the ext4 filesystem implementation. A local user could exploit this to cause a denial of service (filesystem corruption). CVE-2018-14610, CVE-2018-14611, CVE-2018-14612, CVE-2018-14613 Wen Xu from SSLab at Gatech reported that crafted Btrfs volumes could trigger a crash (Oops) and/or out-of-bounds memory access. An attacker able to mount such a volume could use this to cause a denial of service or possibly for privilege escalation. CVE-2019-5108 Mitchell Frank of Cisco discovered that when the IEEE 802.11 (WiFi) stack was used in AP mode with roaming, it would trigger roaming for a newly associated station before the station was authenticated. An attacker within range of the AP could use this to cause a denial of service, either by filling up a switching table or by redirecting traffic away from other stations. CVE-2019-19319 Jungyeon discovered that a crafted filesystem can cause the ext4 implementation to deallocate or reallocate journal blocks. A user permitted to mount filesystems could use this to cause a denial of service (crash), or possibly for privilege escalation. CVE-2019-19447 It was discovered that the ext4 filesystem driver did not safely handle unlinking of an inode that, due to filesystem corruption, already has a link count of 0. An attacker able to mount arbitrary ext4 volumes could use this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. CVE-2019-19768 Tristan Madani reported a race condition in the blktrace debug facility that could result in a use-after-free. A local user able to trigger removal of block devices could possibly use this to cause a denial of service (crash) or for privilege escalation. CVE-2019-20636 The syzbot tool found that the input subsystem did not fully validate keycode changes, which could result in a heap out-of-bounds write. A local user permitted to access the device node for an input or VT device could possibly use this to cause a denial of service (crash or memory corruption) or for privilege escalation. CVE-2020-0009 Jann Horn reported that the Android ashmem driver did not prevent read-only files from being memory-mapped and then remapped as read-write. However, Android drivers are not enabled in Debian kernel configurations. CVE-2020-0543 Researchers at VU Amsterdam discovered that on some Intel CPUs supporting the RDRAND and RDSEED instructions, part of a random value generated by these instructions may be used in a later speculative execution on any core of the same physical CPU. Depending on how these instructions are used by applications, a local user or VM guest could use this to obtain sensitive information such as cryptographic keys from other users or VMs. This vulnerability can be mitigated by a microcode update, either as part of system firmware (BIOS) or through the intel-microcode package in Debian's non-free archive section. This kernel update only provides reporting of the vulnerability and the option to disable the mitigation if it is not needed. CVE-2020-1749 Xiumei Mu reported that some network protocols that can run on top of IPv6 would bypass the Transformation (XFRM) layer used by IPsec, IPcomp/IPcomp6, IPIP, and IPv6 Mobility. This could result in disclosure of information over the network, since it would not be encrypted or routed according to the system policy. CVE-2020-2732 Paulo Bonzini discovered that the KVM implementation for Intel processors did not properly handle instruction emulation for L2 guests when nested virtualization is enabled. This could allow an L2 guest to cause privilege escalation, denial of service, or information leaks in the L1 guest. CVE-2020-8647, CVE-2020-8649 The Hulk Robot tool found a potential MMIO out-of-bounds access in the vgacon driver. A local user permitted to access a virtual terminal (/dev/tty1 etc.) on a system using the vgacon driver could use this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2020-8648 The syzbot tool found a race condition in the the virtual terminal driver, which could result in a use-after-free. A local user permitted to access a virtual terminal could use this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2020-9383 Jordy Zomer reported an incorrect range check in the floppy driver which could lead to a static out-of-bounds access. A local user permitted to access a floppy drive could use this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2020-10690 It was discovered that the PTP hardware clock subsystem did not properly manage device lifetimes. Removing a PTP hardware clock from the system while a user process was using it could lead to a use-after-free. The security impact of this is unclear. CVE-2020-10751 Dmitry Vyukov reported that the SELinux subsystem did not properly handle validating multiple messages, which could allow a privileged attacker to bypass SELinux netlink restrictions. CVE-2020-10942 It was discovered that the vhost_net driver did not properly validate the type of sockets set as back-ends. A local user permitted to access /dev/vhost-net could use this to cause a stack corruption via crafted system calls, resulting in denial of service (crash) or possibly privilege escalation. CVE-2020-11494 It was discovered that the slcan (serial line CAN) network driver did not fully initialise CAN headers for received packets, resulting in an information leak from the kernel to user-space or over the CAN network. CVE-2020-11565 Entropy Moe reported that the shared memory filesystem (tmpfs) did not correctly handle an "mpol" mount option specifying an empty node list, leading to a stack-based out-of-bounds write. If user namespaces are enabled, a local user could use this to cause a denial of service (crash) or possibly for privilege escalation. CVE-2020-11608, CVE-2020-11609, CVE-2020-11668 It was discovered that the ov519, stv06xx, and xirlink_cit media drivers did not properly validate USB device descriptors. A physically present user with a specially constructed USB device could use this to cause a denial-of-service (crash) or possibly for privilege escalation. CVE-2020-12114 Piotr Krysiuk discovered a race condition between the umount and pivot_root operations in the filesystem core (vfs). A local user with the CAP_SYS_ADMIN capability in any user namespace could use this to cause a denial of service (crash). CVE-2020-12464 Kyungtae Kim reported a race condition in the USB core that can result in a use-after-free. It is not clear how this can be exploited, but it could result in a denial of service (crash or memory corruption) or privilege escalation. CVE-2020-12652 Tom Hatskevich reported a bug in the mptfusion storage drivers. An ioctl handler fetched a parameter from user memory twice, creating a race condition which could result in incorrect locking of internal data structures. A local user permitted to access /dev/mptctl could use this to cause a denial of service (crash or memory corruption) or for privilege escalation. CVE-2020-12653 It was discovered that the mwifiex WiFi driver did not sufficiently validate scan requests, resulting a potential heap buffer overflow. A local user with CAP_NET_ADMIN capability could use this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2020-12654 It was discovered that the mwifiex WiFi driver did not sufficiently validate WMM parameters received from an access point (AP), resulting a potential heap buffer overflow. A malicious AP could use this to cause a denial of service (crash or memory corruption) or possibly to execute code on a vulnerable system. CVE-2020-12769 It was discovered that the spi-dw SPI host driver did not properly serialise access to its internal state. The security impact of this is unclear, and this driver is not included in Debian's binary packages. CVE-2020-12770 It was discovered that the sg (SCSI generic) driver did not correctly release internal resources in a particular error case. A local user permitted to access an sg device could possibly use this to cause a denial of service (resource exhaustion). CVE-2020-12826 Adam Zabrocki reported a weakness in the signal subsystem's permission checks. A parent process can choose an arbitary signal for a child process to send when it exits, but if the parent has executed a new program then the default SIGCHLD signal is sent. A local user permitted to run a program for several days could bypass this check, execute a setuid program, and then send an arbitrary signal to it. Depending on the setuid programs installed, this could have some security impact. CVE-2020-13143 Kyungtae Kim reported a potential heap out-of-bounds write in the USB gadget subsystem. A local user permitted to write to the gadget configuration filesystem could use this to cause a denial of service (crash or memory corruption) or potentially for privilege escalation. For Debian 8 "Jessie", these problems have been fixed in version 3.16.84-1. We recommend that you upgrade your linux packages. Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. 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If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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