SB20210120105 - Heap-based buffer overflow in dnsmasq (Alpine package)
Published: January 20, 2021
Security Bulletin ID
SB20210120105
Severity
Medium
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) Heap-based buffer overflow (CVE-ID: CVE-2020-25683)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in rfc1035.c:extract_name(). A remote attacker can pass specially crafted data to the application, trigger heap-based buffer overflow and cause a denial of service condition on the target 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