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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2022.4060 linux security update 16 August 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Linux kernel Publisher: Debian Operating System: Debian GNU/Linux Resolution: Patch/Upgrade CVE Names: CVE-2022-36946 CVE-2022-36879 CVE-2022-29901 CVE-2022-29900 CVE-2022-26373 CVE-2022-2588 CVE-2022-2586 CVE-2022-2585 Original Bulletin: http://www.debian.org/security/2022/dsa-5207 Comment: CVSS (Max): 7.8 CVE-2022-2585 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) CVSS Source: NVD, [Red Hat] Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - - ------------------------------------------------------------------------- Debian Security Advisory DSA-5207-1 security@debian.org https://www.debian.org/security/ Salvatore Bonaccorso August 15, 2022 https://www.debian.org/security/faq - - ------------------------------------------------------------------------- Package : linux CVE ID : CVE-2022-2585 CVE-2022-2586 CVE-2022-2588 CVE-2022-26373 CVE-2022-29900 CVE-2022-29901 CVE-2022-36879 CVE-2022-36946 Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2022-2585 A use-after-free flaw in the implementation of POSIX CPU timers may result in denial of service or in local privilege escalation. CVE-2022-2586 A use-after-free in the Netfilter subsystem may result in local privilege escalation for a user with the CAP_NET_ADMIN capability in any user or network namespace. CVE-2022-2588 Zhenpeng Lin discovered a use-after-free flaw in the cls_route filter implementation which may result in local privilege escalation for a user with the CAP_NET_ADMIN capability in any user or network namespace. CVE-2022-26373 It was discovered that on certain processors with Intel's Enhanced Indirect Branch Restricted Speculation (eIBRS) capabilities there are exceptions to the documented properties in some situations, which may result in information disclosure. Intel's explanation of the issue can be found at <https://www.intel.com/content/www/us/en/developer/articles/technical/software-security-guidance/advisory-guidance/post-barrier-return-stack-buffer-predictions.html> CVE-2022-29900 Johannes Wikner and Kaveh Razavi reported that for AMD/Hygon processors, mis-trained branch predictions for return instructions may allow arbitrary speculative code execution under certain microarchitecture-dependent conditions. A list of affected AMD CPU types can be found at <https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1037> CVE-2022-29901 Johannes Wikner and Kaveh Razavi reported that for Intel processors (Intel Core generation 6, 7 and 8), protections against speculative branch target injection attacks were insufficient in some circumstances, which may allow arbitrary speculative code execution under certain microarchitecture-dependent conditions. More information can be found at <https://www.intel.com/content/www/us/en/developer/articles/technical/software-security-guidance/advisory-guidance/return-stack-buffer-underflow.html> CVE-2022-36879 A flaw was discovered in xfrm_expand_policies in the xfrm subsystem which can cause a reference count to be dropped twice. CVE-2022-36946 Domingo Dirutigliano and Nicola Guerrera reported a memory corruption flaw in the Netfilter subsystem which may result in denial of service. For the stable distribution (bullseye), these problems have been fixed in version 5.10.136-1. 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----- iQKTBAEBCgB9FiEERkRAmAjBceBVMd3uBUy48xNDz0QFAmL6nWxfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldDQ2 NDQ0MDk4MDhDMTcxRTA1NTMxRERFRTA1NENCOEYzMTM0M0NGNDQACgkQBUy48xND z0QvZw//d1vmeS3Q0KR6e8CxKW+HzsQPyTrDCM5IfEo+dTOqFkMVHV3sVMWEE3QB D3G4sLwh1rfI1II8F4EXPCHdiKVOgViArYHe7VuQjJunJ2chqulyYm/pWnk2PKs+ HF2D6uLJqC9Cb2/IQJ/mpcI0tiuo5MWbjsmvxZcQoVGoPI2e3w8YPYrssyqqT061 04dhquMWQuDjpX+BstfX410tsWurElHWRBpxuygvxaH185LQ5UV4OJHgYrUw4jtL iCIx5bH00fu+D2LpK5c8bj7ZdfKtyWXa8r4K2lAOUv7UktZkOFEV32nZVQmbcCUJ ZWce41DP5WDVyiu+S00bAODrDLLcgXmb9gfyWoLejefYx9Ij8CIKoUFz0mNAqKTi CN6elsLE3I8JHLglro1Iq6msHMPZTz8xWRrPNoi87Xb6NlJuAyD/Q1p4tjkXzObm D2a9PByxaIfdjmPGiIQyvxTfDJuH/4j3as1NA24Ni0ZRl5sgd0Sf2i1Of47eQMII v33DMR5WacgB+w3MzgnEnYXFhEZ8O82T2bNU6mAjvZO4EPjCYIDiL9qtqe73SLhQ wzeawwLHN8AtqXgmrPPVVgNcCDvW5lUtlobiA0EFzPVBzn06Xx+afWxtAnn4a27/ qN+GmKYjOqykJK5Ghy9sHE+uM9amp1OpLkTa6/nWxAKEBhb4Xv8= =+6M7 - -----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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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: https://auscert.org.au/gpg-key/ iQIVAwUBYvr9k8kNZI30y1K9AQjy/hAAo53ikH9Doe7UC1S3IR+x7RuYPHQnWIha Sj338Nn8NNS4SCZFmbm2oNvPjRokV98FiE5XnMXv60ZvIbS9yn1ejEReV5/cXsMV /5uY3FceM4FtjniIQcQaFfcCpumRNVV0FH3D4kfLF+5PXP+u0XL0whRWnA649ClR Uzzo3VLza/EuHH6fnu31IgfarI9qI+R0FGG6XRmrzoi3wtShzykC1vIzaMotb2Za drtgvzfD30FHWTFzFpKLwA7n/Ix9c7KO4K/+4LOn4xaPDEAi+J3gMzxSUGVuRetn YF3ya8ft7r+y1nMizY+Zscbs+KPg3VFT8H4tfmyTqhHR40VVYCkTvKQrjsMsX3yT 8ouV2pAX2NbIALBpUgi4bOAlmGcfGxORxcH4ANnpiXrhh9a88f97PtcCD5MrjmeB 4E8cGG2dPKbJpv8v4PGh8RKQPeiu+4ar5JJa+6igtPIb1FA5FJxkiKIsAMVNvG78 AOj7scr+k16AI7noJYkTk90TRsMxv7uq8oqjSxjx3ZUWpGZwOb3FUQwSvCu/Hhzo xZvhzo5wB1QZZ9zkYhID96PGB8Ci1SzwwOYbKavpnSbE2IKxNIABCFNH0hiD4l+C o5bRAjae/7hd7C1v+Tqf6uGefysRk5OcNPZk1MmHRZV2TiI4rV1XB9PpU2man81V hKIuzS3FEe4= =wlBr -----END PGP SIGNATURE-----