Privilege escalation in Linux kernel - CVE-2016-7097

Vulnerability identifier: #VU5388

CSH Severity: Low

CVSS v4: 8.5 [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]

CVE-ID: CVE-2016-7097

CWE-ID: CWE-264

Exploitation vector: Local access

Exploit availability: No public exploit available

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.

Linux kernel
Ubuntu
Fedora
linux (Ubuntu package)
kernel

Update to version 4.9.6.

Linux kernel - update to 4.1.37
linux (Ubuntu package) - update to 4.4.0-51.72
kernel - addressed in versions 4.9.6-100.fc24, 4.9.6-200.fc25

• 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

• Privilege escalation in Linux Kernel
• Ubuntu update for Linux kernel
• Multiple vulnerabilities in Linux Kernel
• Multiple vulnerabilities in Linux Kernel
• Fedora 25 update for kernel
• Fedora 24 update for kernel
• Ubuntu update for linux