Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2022.3247 linux security update 4 July 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Linux Kernel Publisher: Debian Operating System: Debian GNU/Linux Resolution: Patch/Upgrade CVE Names: CVE-2022-33981 CVE-2022-32296 CVE-2022-32250 CVE-2022-30594 CVE-2022-29581 CVE-2022-28390 CVE-2022-28389 CVE-2022-28388 CVE-2022-28356 CVE-2022-27666 CVE-2022-26490 CVE-2022-23960 CVE-2022-21166 CVE-2022-21125 CVE-2022-21123 CVE-2022-2153 CVE-2022-1975 CVE-2022-1974 CVE-2022-1734 CVE-2022-1729 CVE-2022-1652 CVE-2022-1516 CVE-2022-1419 CVE-2022-1353 CVE-2022-1205 CVE-2022-1204 CVE-2022-1199 CVE-2022-1198 CVE-2022-1195 CVE-2022-1184 CVE-2022-1048 CVE-2022-1016 CVE-2022-1012 CVE-2022-1011 CVE-2022-0854 CVE-2022-0812 CVE-2022-0494 CVE-2021-4197 Original Bulletin: http://www.debian.org/security/2022/dsa-5173 Comment: CVSS (Max): 8.2 CVE-2022-1012 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H) CVSS Source: NVD, [Red Hat], SUSE Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - - ------------------------------------------------------------------------- Debian Security Advisory DSA-5173-1 security@debian.org https://www.debian.org/security/ Ben Hutchings July 03, 2022 https://www.debian.org/security/faq - - ------------------------------------------------------------------------- Package : linux CVE ID : CVE-2021-4197 CVE-2022-0494 CVE-2022-0812 CVE-2022-0854 CVE-2022-1011 CVE-2022-1012 CVE-2022-1016 CVE-2022-1048 CVE-2022-1184 CVE-2022-1195 CVE-2022-1198 CVE-2022-1199 CVE-2022-1204 CVE-2022-1205 CVE-2022-1353 CVE-2022-1419 CVE-2022-1516 CVE-2022-1652 CVE-2022-1729 CVE-2022-1734 CVE-2022-1974 CVE-2022-1975 CVE-2022-2153 CVE-2022-21123 CVE-2022-21125 CVE-2022-21166 CVE-2022-23960 CVE-2022-26490 CVE-2022-27666 CVE-2022-28356 CVE-2022-28388 CVE-2022-28389 CVE-2022-28390 CVE-2022-29581 CVE-2022-30594 CVE-2022-32250 CVE-2022-32296 CVE-2022-33981 Debian Bug : 922204 1006346 1013299 Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2021-4197 Eric Biederman reported that incorrect permission checks in the cgroup process migration implementation can allow a local attacker to escalate privileges. CVE-2022-0494 The scsi_ioctl() was susceptible to an information leak only exploitable by users with CAP_SYS_ADMIN or CAP_SYS_RAWIO capabilities. CVE-2022-0812 It was discovered that the RDMA transport for NFS (xprtrdma) miscalculated the size of message headers, which could lead to a leak of sensitive information between NFS servers and clients. CVE-2022-0854 Ali Haider discovered a potential information leak in the DMA subsystem. On systems where the swiotlb feature is needed, this might allow a local user to read sensitive information. CVE-2022-1011 Jann Horn discovered a flaw in the FUSE (Filesystem in User-Space) implementation. A local user permitted to mount FUSE filesystems could exploit this to cause a use-after-free and read sensitive information. CVE-2022-1012, CVE-2022-32296 Moshe Kol, Amit Klein, and Yossi Gilad discovered a weakness in randomisation of TCP source port selection. CVE-2022-1016 David Bouman discovered a flaw in the netfilter subsystem where the nft_do_chain function did not initialize register data that nf_tables expressions can read from and write to. A local attacker can take advantage of this to read sensitive information. CVE-2022-1048 Hu Jiahui discovered a race condition in the sound subsystem that can result in a use-after-free. A local user permitted to access a PCM sound device can take advantage of this flaw to crash the system or potentially for privilege escalation. CVE-2022-1184 A flaw was discovered in the ext4 filesystem driver which can lead to a use-after-free. A local user permitted to mount arbitrary filesystems could exploit this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2022-1195 Lin Ma discovered race conditions in the 6pack and mkiss hamradio drivers, which could lead to a use-after-free. A local user could exploit these to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. CVE-2022-1198 Duoming Zhou discovered a race condition in the 6pack hamradio driver, which could lead to a use-after-free. A local user could exploit this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. CVE-2022-1199, CVE-2022-1204, CVE-2022-1205 Duoming Zhou discovered race conditions in the AX.25 hamradio protocol, which could lead to a use-after-free or null pointer dereference. A local user could exploit this to cause a denial of service (memory corruption or crash) or possibly for privilege escalation. CVE-2022-1353 The TCS Robot tool found an information leak in the PF_KEY subsystem. A local user can receive a netlink message when an IPsec daemon registers with the kernel, and this could include sensitive information. CVE-2022-1419 Minh Yuan discovered a race condition in the vgem virtual GPU driver that can lead to a use-after-free. A local user permitted to access the GPU device can exploit this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2022-1516 A NULL pointer dereference flaw in the implementation of the X.25 set of standardized network protocols, which can result in denial of service. This driver is not enabled in Debian's official kernel configurations. CVE-2022-1652 Minh Yuan discovered a race condition in the floppy driver that can lead to a use-after-free. A local user permitted to access a floppy drive device can exploit this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2022-1729 Norbert Slusarek discovered a race condition in the perf subsystem which could result in local privilege escalation to root. The default settings in Debian prevent exploitation unless more permissive settings have been applied in the kernel.perf_event_paranoid sysctl. CVE-2022-1734 Duoming Zhou discovered race conditions in the nfcmrvl NFC driver that could lead to a use-after-free, double-free or null pointer dereference. A local user might be able to exploit these for denial of service (crash or memory corruption) or possibly for privilege escalation. This driver is not enabled in Debian's official kernel configurations. CVE-2022-1974, CVE-2022-1975 Duoming Zhou discovered that the NFC netlink interface was suspectible to denial of service. CVE-2022-2153 "kangel" reported a flaw in the KVM implementation for x86 processors which could lead to a null pointer dereference. A local user permitted to access /dev/kvm could exploit this to cause a denial of service (crash). CVE-2022-21123, CVE-2022-21125, CVE-2022-21166 Various researchers discovered flaws in Intel x86 processors, collectively referred to as MMIO Stale Data vulnerabilities. These are similar to the previously published Microarchitectural Data Sampling (MDS) issues and could be exploited by local users to leak sensitive information. For some CPUs, the mitigations for these issues require updated microcode. An updated intel-microcode package may be provided at a later date. The updated CPU microcode may also be available as part of a system firmware ("BIOS") update. Further information on the mitigation can be found at <https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/processor_mmio_stale_data.html> or in the linux-doc-4.19 package. CVE-2022-23960 Researchers at VUSec discovered that the Branch History Buffer in Arm processors can be exploited to create information side- channels with speculative execution. This issue is similar to Spectre variant 2, but requires additional mitigations on some processors. This was previously mitigated for 32-bit Arm (armel and armhf) architectures and is now also mitigated for 64-bit Arm (arm64). This can be exploited to obtain sensitive information from a different security context, such as from user-space to the kernel, or from a KVM guest to the kernel. CVE-2022-26490 Buffer overflows in the STMicroelectronics ST21NFCA core driver can result in denial of service or privilege escalation. This driver is not enabled in Debian's official kernel configurations. CVE-2022-27666 "valis" reported a possible buffer overflow in the IPsec ESP transformation code. A local user can take advantage of this flaw to cause a denial of service or for privilege escalation. CVE-2022-28356 "Beraphin" discovered that the ANSI/IEEE 802.2 LLC type 2 driver did not properly perform reference counting on some error paths. A local attacker can take advantage of this flaw to cause a denial of service. CVE-2022-28388 A double free vulnerability was discovered in the 8 devices USB2CAN interface driver. CVE-2022-28389 A double free vulnerability was discovered in the Microchip CAN BUS Analyzer interface driver. CVE-2022-28390 A double free vulnerability was discovered in the EMS CPC-USB/ARM7 CAN/USB interface driver. CVE-2022-29581 Kyle Zeng discovered a reference-counting bug in the cls_u32 network classifier which can lead to a use-after-free. A local user can exploit this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. CVE-2022-30594 Jann Horn discovered a flaw in the interaction between ptrace and seccomp subsystems. A process sandboxed using seccomp() but still permitted to use ptrace() could exploit this to remove the seccomp restrictions. CVE-2022-32250 Aaron Adams discovered a use-after-free in Netfilter which may result in local privilege escalation to root. CVE-2022-33981 Yuan Ming from Tsinghua University reported a race condition in the floppy driver involving use of the FDRAWCMD ioctl, which could lead to a use-after-free. A local user with access to a floppy drive device could exploit this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation. This ioctl is now disabled by default. For the oldstable distribution (buster), these problems have been fixed in version 4.19.249-2. Due to an issue in the signing service (Cf. Debian bug #1012741), the vport-vxlan module cannot be loaded for the signed kernel for amd64 in this update. This update also corrects a regression in the network scheduler subsystem (bug #1013299). For the 32-bit Arm (armel and armhf) architectures, this update enables optimised implementations of several cryptographic and CRC algorithms. For at least AES, this should remove a timing side- channel that could lead to a leak of sensitive information. This update includes many more bug fixes from stable updates 4.19.236-4.19.249 inclusive, including for bug #1006346. The random driver has been backported from Linux 5.19, fixing numerous performance and correctness issues. Some changes will be visible: - - - The entropy pool size is now 256 bits instead of 4096. You may need to adjust the configuration of system monitoring or user-space entropy gathering services to allow for this. - - - On systems without a hardware RNG, the kernel may log more uses of /dev/urandom before it is fully initialised. These uses were previously under-counted and this is not a regression. 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----- iQKTBAEBCgB9FiEERkRAmAjBceBVMd3uBUy48xNDz0QFAmLBuTxfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldDQ2 NDQ0MDk4MDhDMTcxRTA1NTMxRERFRTA1NENCOEYzMTM0M0NGNDQACgkQBUy48xND z0TdzQ//Yxq7eTZmPsDVvj1ArPIDwE4w/CPyoYeXiiSBhWD4ueYAvWp3moPmUZmc a6is1JkP8MILLekkeAUJQjaxjHOn+kWIlfV7ZLJ7fzTrVjkHoQvzs8a8mv85ybaD sfQlVuEA7VPxfJI/4/31fIAuTPy1S+qd3r6qtESL2IQdZPFS8SOHwZrTt9DPGXhl XtY3XNm4fysgRmtDYNpqndluVXeTc39bXe9YBRG1bTdrI9QCTykSx2/HeZDOBiMQ Wb7cjXAUoy0q3c5QncTcqtgN3ax549qx/1oGZGXDlycZFOIE8vHMY3FyBXXURPz4 JgKkSf+NR87aeDi2SREjOm0CIp/laSc1VFxpf0TTT51kuPWhXzsleZ23eN2po106 UTyDFsNtNToHgoDpPFA/3GsioqirzbwwVUs0qKDeFdC1VZjJ5H+1JzO4JPbWGOTo rtoz64JHU9oIA3OJs3rYpgIphd6fzUfia89tuflE5/MkeAWSVP7f0rpUgGQy8gzw TdsN4p7aCLhQezMpFVKADIB1WfkBtXncDrPC//pxxnRZuu2efrlYv6se+dnOJM9/ WeDSm4hsi6u+MH7DBmVhDgjF/gatSbejud8rXYUcVKZArraj9k9rCArxcVKmJHMr 6teKhjSMX1B27AUJtTqSU1eEmErxbA+yEHCSEOW+8JNnLQZWDSI= =j1cH - -----END PGP SIGNATURE----- - --------------------------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. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. 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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: https://auscert.org.au/gpg-key/ iQIVAwUBYsJ2mMkNZI30y1K9AQh1pg/9E5WN13k1ONscSRu232xRFK4ui0x55ZWt 04xWB3D9qPeG9Ag1aVvFodKp1bPzWxJZTScoWVEjRY9PCTVtd2RQVGZxWztym1ew azx1f0eLfDSo1fPQ2d4Ml3qh7mfBhI79UkHfXSHxr5Y11q7u8w58s7nb8x/zEh4P 4IgtQ5iIKNgA+Kphxb9xtFfBTxlNEh5K4jGzHXQ/yGmJ6S09RZ5/46DNaXYJzC9o M3y4keImQ4iJCF4TVVkYTzfoLQ3n8q4KX8e1NyPc4HKuYqrzNJVdM6qhmOTm56ds Kr3gz0v21WdGwj18S1p0ErpnJSPsq0Jx1Uo0sqSyw2FpKsOSkzWGWzV5bepNd2Tb 3WDVOEkrLyxb/sLMuKKeZJKubl95+y2fuMn5u+Lnf8m8rYXwAqyqRSpuL/k7usKV eXm36T2nqAfifJRlhpLTboiikw/lC+B540SvOVqljWxxhzJl5UN0dDz/FtTYb8/P JoZfqhdnD0FpOt7UVbNWTpoXfIFPnsf6pxZwjALjYH2KWPaiVLyItEQg/0GQNbs8 CIHQuVQ+EsTh2MODDPJZnECVQ/sF21gkaBKmxr/UCosjKoDEAyqNNjDyHXQh2jOq P/msxyP93p1c97a04VSRyDwy7sX0eMaJrMxMHcKipLtDuKQ1tCoFqfKQRW/BnUUv NgH4/tju39g= =P5mE -----END PGP SIGNATURE-----