Vulnerability in Linux Kernel
CVE-2014-8989
The Linux kernel through 3.17.4 does not properly restrict dropping of supplemental group memberships in certain namespace scenarios, which allows local users to bypass intended file permissions by leveraging a POSIX ACL containing an entry for the group category that is more restrictive than the entry for the other category, aka a "negative groups" issue, related to kernel/groups.c, kernel/uid16.c, and kernel/user_namespace.c.
Published · last modified .
CVSS v2 metric
CVSS v2 base score 4.6 (Medium). Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.005 (40.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Linux Kernel — versions 3.0, 3.0.1, 3.0.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.fedoraproject.org/pipermail/package-announce/2015-January/147864.html (vendor-advisory)
- www.ubuntu.com/usn/USN-2515-1 (vendor-advisory)
- www.securityfocus.com/bid/71154 (vdb-entry)
- www.ubuntu.com/usn/USN-2518-1 (vendor-advisory)
- www.mandriva.com/security/advisories (vendor-advisory)
- lists.fedoraproject.org/pipermail/package-announce/2015-January/147973.html (vendor-advisory)
- thread.gmane.org/gmane.linux.man/7385/ (Exploit)
- www.ubuntu.com/usn/USN-2517-1 (vendor-advisory)
- www.openwall.com/lists/oss-security/2014/11/20/4 (mailing-list)
- www.ubuntu.com/usn/USN-2516-1 (vendor-advisory)
Frequently asked questions
- What is CVE-2014-8989?
- CVE-2014-8989 is a vulnerability in Linux Kernel, classified under CWE-264. Published 2014-11-30.
- Is CVE-2014-8989 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.