CVE-2017-5551 Affecting kernel-tools package, versions <0:4.4.51-40.58.amzn1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-AMZN201803-KERNELTOOLS-1704785
- published27 Sept 2021
- disclosed6 Feb 2017
Introduced: 6 Feb 2017
CVE-2017-5551 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2018.03 kernel-tools to version 0:4.4.51-40.58.amzn1 or higher.
This issue was patched in ALAS-2017-805.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-tools package and not the kernel-tools package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.
The simple_set_acl function in fs/posix_acl.c in the Linux kernel before 4.9.6 preserves the setgid bit during a setxattr call involving a tmpfs filesystem, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-7097.
References
- http://www.securityfocus.com/bid/95717
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=497de07d89c1410d76a15bec2bb41f24a2a89f31
- https://bugzilla.redhat.com/show_bug.cgi?id=1416126
- https://github.com/torvalds/linux/commit/497de07d89c1410d76a15bec2bb41f24a2a89f31
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.6
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5551
- http://www.debian.org/security/2017/dsa-3791
- http://www.openwall.com/lists/oss-security/2017/01/21/3
- http://www.securitytracker.com/id/1038053