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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2022.0250 linux security update 21 January 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: linux kernel Publisher: Debian Operating System: Debian GNU/Linux Impact/Access: Increased Privileges -- Existing Account Denial of Service -- Existing Account Access Confidential Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2022-23222 CVE-2022-0185 CVE-2021-45480 CVE-2021-45469 CVE-2021-45095 CVE-2021-39685 CVE-2021-28715 CVE-2021-28714 CVE-2021-28713 CVE-2021-28712 CVE-2021-28711 CVE-2021-4155 Reference: ESB-2022.0215 ESB-2022.0187 ESB-2022.0121 Original Bulletin: http://www.debian.org/security/2022/dsa-5050 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - - ------------------------------------------------------------------------- Debian Security Advisory DSA-5050-1 security@debian.org https://www.debian.org/security/ Salvatore Bonaccorso January 20, 2022 https://www.debian.org/security/faq - - ------------------------------------------------------------------------- Package : linux CVE ID : CVE-2021-4155 CVE-2021-28711 CVE-2021-28712 CVE-2021-28713 CVE-2021-28714 CVE-2021-28715 CVE-2021-39685 CVE-2021-45095 CVE-2021-45469 CVE-2021-45480 CVE-2022-0185 CVE-2022-23222 Debian Bug : 988044 996974 Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2021-4155 Kirill Tkhai discovered a data leak in the way the XFS_IOC_ALLOCSP IOCTL in the XFS filesystem allowed for a size increase of files with unaligned size. A local attacker can take advantage of this flaw to leak data on the XFS filesystem. CVE-2021-28711, CVE-2021-28712, CVE-2021-28713 (XSA-391) Juergen Gross reported that malicious PV backends can cause a denial of service to guests being serviced by those backends via high frequency events, even if those backends are running in a less privileged environment. CVE-2021-28714, CVE-2021-28715 (XSA-392) Juergen Gross discovered that Xen guests can force the Linux netback driver to hog large amounts of kernel memory, resulting in denial of service. CVE-2021-39685 Szymon Heidrich discovered a buffer overflow vulnerability in the USB gadget subsystem, resulting in information disclosure, denial of service or privilege escalation. CVE-2021-45095 It was discovered that the Phone Network protocol (PhoNet) driver has a reference count leak in the pep_sock_accept() function. CVE-2021-45469 Wenqing Liu reported an out-of-bounds memory access in the f2fs implementation if an inode has an invalid last xattr entry. An attacker able to mount a specially crafted image can take advantage of this flaw for denial of service. CVE-2021-45480 A memory leak flaw was discovered in the __rds_conn_create() function in the RDS (Reliable Datagram Sockets) protocol subsystem. CVE-2022-0185 William Liu, Jamie Hill-Daniel, Isaac Badipe, Alec Petridis, Hrvoje Misetic and Philip Papurt discovered a heap-based buffer overflow flaw in the legacy_parse_param function in the Filesystem Context functionality, allowing an local user (with CAP_SYS_ADMIN capability in the current namespace) to escalate privileges. CVE-2022-23222 'tr3e' discovered that the BPF verifier does not properly restrict several *_OR_NULL pointer types allowing these types to do pointer arithmetic. A local user with the ability to call bpf(), can take advantage of this flaw to excalate privileges. Unprivileged calls to bpf() are disabled by default in Debian, mitigating this flaw. For the stable distribution (bullseye), these problems have been fixed in version 5.10.92-1. This version includes changes which were aimed to land in the next Debian bullseye point release. 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----- iQKTBAEBCgB9FiEERkRAmAjBceBVMd3uBUy48xNDz0QFAmHpj+RfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldDQ2 NDQ0MDk4MDhDMTcxRTA1NTMxRERFRTA1NENCOEYzMTM0M0NGNDQACgkQBUy48xND z0T3pg/+O3hQq7q+8FQ70/0kCWXk1tfmjkBJHVQENcy3qLjaQEL6bFX/mCh799QL G+NtbCiA1+x/eVbXpzqhZeVXrf+5mn6hqKAfQJ9C74XYfEMt5KQiwZ4yMJrTOZkx xXObcech/KORcUAUAjhKW/3bOS/n5gkTxi2Z1mJtVwgU1OdRkeQV/mB6V2nGWO4V yg4tAfDUjgUIEl2w1qT4s4SaaoAMNcLJmjPUXwiLyhHNT6zGSWcKhd2U80avcdMx 9YMmOH8EfA7htOA2SJRUNfFUyRQAKJO3GUdBNAEwFzbswG/oohgcCjC6jaEVKBge Ygzyvyx7m5eL3giJnTtR8A79bINXgT/KA6wDtQzZeQUFxUsOl3efEG3I8yFz57aL ZHjYm/aklhrb2e+66HHLznwa7dg9Sc2bZ3NvYVrhX8bxMSq4q2RLzxg0FPoz7fas f9YiZkn2hefilw+n8Of6zT7Ui9dXaR1o2JZaFDmUwvZN6MKnlySHu6AWUgjeT6T1 L2IZbuzmT4fquP0LiaKUd3fr9i4fF1fBNp7Kdv383wfNRJO/wP4cKTgv5WeDuEXy rp9k5XR4Q6F9aU4InMq0KeqpZ1rWW5gBOJ3htFmNbzEebM3AQRM1MXd/1FLk8EzI +MDOP6xf+fVMiW6dsx+4QpvG7yEIzmnbraNKFfzp8VxofW0SZGk= =SlPI - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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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). 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