CVE-2016-4485

Published: 23 May 2016

The llc_cmsg_rcv function in net/llc/af_llc.c in the Linux kernel before 4.5.5 does not initialize a certain data structure, which allows attackers to obtain sensitive information from kernel stack memory by reading a message.

From the Ubuntu security team

Kangjie Lu discovered an information leak in the ANSI/IEEE 802.2 LLC type 2 Support implementations in the Linux kernel. A local attacker could use this to obtain potentially sensitive information from kernel memory.

Priority

Medium

CVSS 3 base score: 7.5

Status

Notes

android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.10 and earlier preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4485
• https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=b8670c09f37bdf2847cc44f36511a53afc6161fd
• http://www.openwall.com/lists/oss-security/2016/05/05/1
• https://ubuntu.com/security/notices/USN-2989-1
• https://ubuntu.com/security/notices/USN-2996-1
• https://ubuntu.com/security/notices/USN-2997-1
• https://ubuntu.com/security/notices/USN-2998-1
• https://ubuntu.com/security/notices/USN-3000-1
• https://ubuntu.com/security/notices/USN-3001-1
• https://ubuntu.com/security/notices/USN-3002-1
• https://ubuntu.com/security/notices/USN-3003-1
• https://ubuntu.com/security/notices/USN-3004-1
• https://ubuntu.com/security/notices/USN-3005-1
• https://ubuntu.com/security/notices/USN-3006-1
• https://ubuntu.com/security/notices/USN-3007-1
• NVD
• Launchpad
• Debian

Bugs

• https://launchpad.net/bugs/1578496