#VU5388 Privilege escalation in Linux kernel - CVE-2016-7097

Vulnerability identifier: #VU5388

Vulnerability risk: Low

CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2016-7097

CWE-ID: CWE-264

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerable software:
Linux kernel

Software vendor:
Linux Foundation

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The weakness exists due to the setgid bit being preserved during a setxattr call by the filesystem implementation. A local attacker can leverage the existence of a setgid program to gain group privileges.

Successful exploitation of the vulnerability results in privileges escalation.

Update to version 4.9.6.

• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.6
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.1.37