SB2020090711 - Heap-based buffer overflow in bison (Alpine package)
Published: September 7, 2020
Security Bulletin ID
SB2020090711
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-2020-24979)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in src/symtab.c in GNU bison when processing files. A remote attacker can trick the victim to open a specially crafted file that redefines the EOF token, trigger heap-based buffer overflow and crash the application.
Remediation
Install update from vendor's website.