#VU822 Privilege Escalation in FreeBSD
Published: October 10, 2016 / Updated: October 11, 2016
Vulnerability identifier: #VU822
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: N/A
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
FreeBSD
FreeBSD
Software vendor:
FreeBSD Foundation
FreeBSD Foundation
Description
The vulnerability allows a local user to obtain elevated privileges on the target system.
The vulnerability exists due to improper processing of symbolic links (symlinks) or hard links. By
overwriting files outside of the libarchive extraction directory or modifying the directory permissions a mailicious user can obtain root privileges on the system.
Successful exploitation of this vulnerability will allow the local attacker to obtain elevated privileges on vulnerable system.
Remediation
Update patched versions:
- 10.1 (https://security.FreeBSD.org/patches/SA-16:31/libarchive-10.1.patch);
- 10.2 (https://security.FreeBSD.org/patches/SA-16:31/libarchive-10.2.patch);
- 10.3 (https://security.FreeBSD.org/patches/SA-16:31/libarchive-10.3.patch).
- 10.1 (https://security.FreeBSD.org/patches/SA-16:31/libarchive-10.1.patch);
- 10.2 (https://security.FreeBSD.org/patches/SA-16:31/libarchive-10.2.patch);
- 10.3 (https://security.FreeBSD.org/patches/SA-16:31/libarchive-10.3.patch).