SB2016111616 - Race condition in Linux kernel proc
Published: November 16, 2016
Security Bulletin ID
SB2016111616
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Race condition (CVE-ID: CVE-2016-7916)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local non-authenticated attacker to gain access to sensitive information.
The vulnerability exists due to a race condition within the environ_read() function in fs/proc/base.c. A local non-authenticated attacker can gain access to sensitive information.
Remediation
Install update from vendor's website.
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8148a73c9901a8794a50f950083c00ccf97d43b3
- http://source.android.com/security/bulletin/2016-11-01.html
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.4
- http://www.securityfocus.com/bid/94138
- http://www.ubuntu.com/usn/USN-3159-1
- http://www.ubuntu.com/usn/USN-3159-2
- https://bugzilla.kernel.org/show_bug.cgi?id=116461
- https://forums.grsecurity.net/viewtopic.php?f=3&t=4363
- https://github.com/torvalds/linux/commit/8148a73c9901a8794a50f950083c00ccf97d43b3