Cloud Foundry Logo
blog single gear
Security Advisory

USN-2949-1 Linux kernel (Vivid HWE) vulnerabilities

USN-2949-1 Linux kernel (Vivid HWE) vulnerabilities

Severity

Low/Medium

Vendor

Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 14.04 LTS

Description

Venkatesh Pottem discovered a use-after-free vulnerability in the Linux kernel’s CXGB3 driver. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2015-8812)

Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux Extended Verification Module (EVM). An attacker could use this to affect system integrity. (CVE-2016-2085)

David Herrmann discovered that the Linux kernel incorrectly accounted file descriptors to the original opener for in-flight file descriptors sent over a unix domain socket. A local attacker could use this to cause a denial of service (resource exhaustion). (CVE-2016-2550)

It was discovered that the Linux kernel did not enforce limits on the amount of data allocated to buffer pipes. A local attacker could use this to cause a denial of service (resource exhaustion). (CVE-2016-2847)

Affected Products and Versions

Severity is low/medium unless otherwise noted.

  • Cloud Foundry BOSH stemcells 3146.x versions prior to 3146.11 AND other versions prior to 3215.4 are vulnerable

Mitigation

Users of affected versions should apply the following mitigation:

  • The Cloud Foundry project recommends that Cloud Foundry upgrade BOSH stemcell 3146.x versions to 3146.11 OR other versions to 3232.2

Credit

Venkatesh Pottem, Xiaofei Rex Guo, David Herrmann

References

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR

SEE ALL ARTICLES