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CVE-2021-33909 Details

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NameCVE-2021-33909
StatusCandidate
Descriptionfs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05.
ReferencesCONFIRM: https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
CONFIRM: https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b
CONFIRM: https://security.netapp.com/advisory/ntap-20210819-0004/
DEBIAN:DSA-4941
URL: https://www.debian.org/security/2021/dsa-4941
FEDORA:FEDORA-2021-07dc0b3eb1
URL: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z4UHHIGISO3FVRF4CQNJS4IKA25ATSFU/
MISC: http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html
MISC: http://packetstormsecurity.com/files/163671/Kernel-Live-Patch-Security-Notice-LSN-0079-1.html
MISC: http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html
MISC: https://www.openwall.com/lists/oss-security/2021/07/20/1
MLIST:[debian-lts-announce] 20210720 [SECURITY] [DLA 2713-1] linux security update
URL: https://lists.debian.org/debian-lts-announce/2021/07/msg00014.html
MLIST:[debian-lts-announce] 20210720 [SECURITY] [DLA 2713-2] linux security update
URL: https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html
MLIST:[debian-lts-announce] 20210720 [SECURITY] [DLA 2714-1] linux-4.19 security update
URL: https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html
MLIST:[oss-security] 20210722 Re: CVE-2021-33909: size_t-to-int vulnerability in Linux's filesystem layer
URL: http://www.openwall.com/lists/oss-security/2021/07/22/7
MLIST:[oss-security] 20210825 Re: CVE-2021-33909: size_t-to-int vulnerability in Linux's filesystem layer
URL: http://www.openwall.com/lists/oss-security/2021/08/25/10
MLIST:[oss-security] 20210916 Containers-optimized OS (COS) membership in the linux-distros list
URL: http://www.openwall.com/lists/oss-security/2021/09/17/2
MLIST:[oss-security] 20210917 Re: Containers-optimized OS (COS) membership in the linux-distros list
URL: http://www.openwall.com/lists/oss-security/2021/09/17/4
MLIST:[oss-security] 20210920 Re: Containers-optimized OS (COS) membership in the linux-distros list
URL: http://www.openwall.com/lists/oss-security/2021/09/21/1
PhaseAssigned (20210607)
VotesNone (candidate not yet proposed)
Comments


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