CVE-2014-9090

Published: 29 November 2014

The do_double_fault function in arch/x86/kernel/traps.c in the Linux kernel through 3.17.4 does not properly handle faults associated with the Stack Segment (SS) segment register, which allows local users to cause a denial of service (panic) via a modify_ldt system call, as demonstrated by sigreturn_32 in the linux-clock-tests test suite.

From the Ubuntu security team

Andy Lutomirski discovered that the Linux kernel does not properly handle faults associated with the Stack Segment (SS) register on the x86 architecture. A local attacker could exploit this flaw to cause a denial of service (panic).

Notes

android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.04 preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support

Status

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9090
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6f442be2fb22be02cafa606f1769fa1e6f894441 (v3.18-rc6)
• http://www.openwall.com/lists/oss-security/2014/11/26
• https://ubuntu.com/security/notices/USN-2441-1
• https://ubuntu.com/security/notices/USN-2442-1
• https://ubuntu.com/security/notices/USN-2443-1
• https://ubuntu.com/security/notices/USN-2444-1
• https://ubuntu.com/security/notices/USN-2445-1
• https://ubuntu.com/security/notices/USN-2446-1
• https://ubuntu.com/security/notices/USN-2447-1
• https://ubuntu.com/security/notices/USN-2448-1
• https://ubuntu.com/security/notices/USN-2464-1
• NVD
• Launchpad
• Debian

Bugs

• https://launchpad.net/bugs/1398795