SB20210120103 - Heap-based buffer overflow in dnsmasq (Alpine package)
Published: January 20, 2021
Security Bulletin ID
SB20210120103
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Heap-based buffer overflow (CVE-ID: CVE-2020-25681)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in "sort_rrset()" when DNSSEC is used. A remote attacker can pass specially crafted data to the application, trigger heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=a15e4f2f871b2eba5b89654ccff9fb9b95f19cbc
- https://git.alpinelinux.org/aports/commit/?id=0bb6e1e51413b6e390e0fe2471e60057346ce519
- https://git.alpinelinux.org/aports/commit/?id=8e0a99d327346c97a25d2e7103480d0c41c0f4e9
- https://git.alpinelinux.org/aports/commit/?id=b0ea8cb6658527d733f801d3183d555681f18da2