SB2021100716 - Privilege escalation in Cisco AnyConnect Secure Mobility Client for Linux and Mac OS
Published: October 7, 2021
Security Bulletin ID
SB2021100716
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Time-of-check Time-of-use (TOCTOU) Race Condition (CVE-ID: CVE-2021-34788)
CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
CVSSv4: 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:Clear
The vulnerability allows a local user to compromise the target system.
The vulnerability exists due to a race condition in the signature verification process for shared library files that are loaded on an affected device. A local user can send a series of crafted interprocess communication (IPC) messages and execute arbitrary code on the target device with root privileges.
Remediation
Install update from vendor's website.