Improper Authentication Affecting kernel-abi-whitelists package, versions <0:3.10.0-693.el7
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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Start learning- Snyk IDSNYK-CENTOS7-KERNELABIWHITELISTS-2084187
- published26 Jul 2021
- disclosed9 Jan 2017
Introduced: 9 Jan 2017
CVE-2017-5551 (opens in a new tab)How to fix?
Upgrade Centos:7 kernel-abi-whitelists to version 0:3.10.0-693.el7 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-abi-whitelists package and not the kernel-abi-whitelists package as distributed by Centos.
See How to fix? for Centos:7 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
- https://access.redhat.com/security/cve/CVE-2017-5551
- http://www.debian.org/security/2017/dsa-3791
- http://www.openwall.com/lists/oss-security/2017/01/21/3
- https://access.redhat.com/errata/RHSA-2017:1842
- http://www.securitytracker.com/id/1038053