Auth bypass in Linux Kernel
CVE-2016-7097
The filesystem implementation in the Linux kernel through 4.8.2 preserves the setgid bit during a setxattr call, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (30.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.ubuntu.com/usn/USN-3146-2 (vendor-advisory)
- www.ubuntu.com/usn/USN-3146-1 (vendor-advisory)
- source.android.com/security/bulletin/2017-04-01
- www.securityfocus.com/bid/92659 (vdb-entry)
- access.redhat.com/errata/RHSA-2017:2669 (vendor-advisory)
- www.spinics.net/lists/linux-fsdevel/msg98328.html (mailing-list, Patch, Third Party Advisory)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Issue Tracking)
- www.openwall.com/lists/oss-security/2016/08/26/3 (mailing-list, Mailing List)
- rhn.redhat.com/errata/RHSA-2017-0817.html (vendor-advisory)
- www.ubuntu.com/usn/USN-3147-1 (vendor-advisory)
Frequently asked questions
- What is CVE-2016-7097?
- CVE-2016-7097 is a medium-severity vulnerability in Linux Kernel, classified under Improper Authorization. CVSS score: 4.4/10. Published 2016-10-16.
- How severe is CVE-2016-7097?
- Medium severity. CVSS v3 base score is 4.4 out of 10.
- Is CVE-2016-7097 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.