SB2020090348 - Double-free error in busybox (Alpine package)
Published: September 3, 2020
Security Bulletin ID
SB2020090348
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Double-free error (CVE-ID: CVE-2018-16841)
The vulnerability allows a remote authenticated attacker to cause DoS condition.
The vulnerability exists due to Samba's KDC will call talloc_free() twice on the same memory if the principal in a validly signed certificate does not match the principal in the AS-REQ when configured to accept smart-card authentication. A remote attacker can trigger double-free with talloc_free() and directly calls abort() and cause the KDC process to crash.
Remediation
Install update from vendor's website.