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CVE-2014-8989

UnknownEPSS 0.49%

Last modified

CVE-2014-8989 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.49% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability
0.49%

38.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
LinuxLinux Kernel<= 3.17.3—
LinuxLinux Kernel3.0Rc1
LinuxLinux Kernel3.0.1—
LinuxLinux Kernel3.0.2—
LinuxLinux Kernel3.0.3—
LinuxLinux Kernel3.0.4—
LinuxLinux Kernel3.0.5—
LinuxLinux Kernel3.0.6—
LinuxLinux Kernel3.0.7—
LinuxLinux Kernel3.0.8—
LinuxLinux Kernel3.0.9—
LinuxLinux Kernel3.0.10—
LinuxLinux Kernel3.0.11—
LinuxLinux Kernel3.0.12—
LinuxLinux Kernel3.0.13—
LinuxLinux Kernel3.0.14—
LinuxLinux Kernel3.0.15—
LinuxLinux Kernel3.0.16—
LinuxLinux Kernel3.0.17—
LinuxLinux Kernel3.0.18—
LinuxLinux Kernel3.0.19—
LinuxLinux Kernel3.0.20—
LinuxLinux Kernel3.0.21—
LinuxLinux Kernel3.0.22—
LinuxLinux Kernel3.0.23—
LinuxLinux Kernel3.0.24—
LinuxLinux Kernel3.0.25—
LinuxLinux Kernel3.0.26—
LinuxLinux Kernel3.0.27—
LinuxLinux Kernel3.0.28—
LinuxLinux Kernel3.0.29—
LinuxLinux Kernel3.0.30—
LinuxLinux Kernel3.0.31—
LinuxLinux Kernel3.0.32—
LinuxLinux Kernel3.0.33—
LinuxLinux Kernel3.0.34—
LinuxLinux Kernel3.0.35—
LinuxLinux Kernel3.0.36—
LinuxLinux Kernel3.0.37—
LinuxLinux Kernel3.0.38—
LinuxLinux Kernel3.0.39—
LinuxLinux Kernel3.0.40—
LinuxLinux Kernel3.0.41—
LinuxLinux Kernel3.0.42—
LinuxLinux Kernel3.0.43—
LinuxLinux Kernel3.0.44—
LinuxLinux Kernel3.0.45—
LinuxLinux Kernel3.0.46—
LinuxLinux Kernel3.0.47—
LinuxLinux Kernel3.0.48—

Showing 50 of 174 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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.
How severe is CVE-2014-8989?
Severity scoring for CVE-2014-8989 is pending analysis. The EPSS model estimates a 0.49% probability of exploitation in the next 30 days.
How do I fix CVE-2014-8989?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST