CVE-2016-2085 Information

Description

The evm_verify_hmac function in security/integrity/evm/evm_main.c in the Linux kernel before 4.5 does not properly copy data which makes it easier for local users to forge MAC values via a timing side-channel attack.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=613317bd212c585c20796c10afe5daaa95d4b0a1 http://www.ubuntu.com/usn/USN-2946-1 http://www.ubuntu.com/usn/USN-2946-2 http://www.ubuntu.com/usn/USN-2947-1 http://www.ubuntu.com/usn/USN-2947-2 http://www.ubuntu.com/usn/USN-2947-3 http://www.ubuntu.com/usn/USN-2948-1 http://www.ubuntu.com/usn/USN-2948-2 http://www.ubuntu.com/usn/USN-2949-1 https://bugzilla.redhat.com/show_bug.cgi?id=1324867 https://github.com/torvalds/linux/commit/613317bd212c585c20796c10afe5daaa95d4b0a1 https://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2085.html https://security-tracker.debian.org/tracker/CVE-2016-2085

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

5.5