Vulnerability in Linux Kernel
CVE-2017-5551
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.
EPSS: 0.004 (33.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
Affected products
- Linux Linux_kernel
- N/a — versions n/a
Public proof-of-concept exploits
References
- cve@mitre.org (x_refsource_CONFIRM, Patch, Third Party Advisory, Issue Tracking)
- cve@mitre.org (mailing-list, x_refsource_MLIST, Patch, Mailing List, Third Party Advisory)
- cve@mitre.org (x_refsource_CONFIRM, Release Notes, Vendor Advisory)
- cve@mitre.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- cve@mitre.org (x_refsource_CONFIRM, Patch, Issue Tracking)
- cve@mitre.org (x_refsource_CONFIRM, Patch, Third Party Advisory, Issue Tracking)
- cve@mitre.org (vendor-advisory, x_refsource_DEBIAN)
- cve@mitre.org (vdb-entry, x_refsource_SECTRACK)
Frequently asked questions
- What is CVE-2017-5551?
- CVE-2017-5551 is a medium-severity vulnerability in Linux Kernel. CVSS score: 4.4/10. Published 2017-02-06.
- How severe is CVE-2017-5551?
- Medium severity. CVSS v3 base score is 4.4 out of 10.
- Is CVE-2017-5551 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.