SB2020090710 - Multiple vulnerabilities in GNU Bison
Published: September 7, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Input validation error (CVE-ID: CVE-2020-24980)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input in src/parse-gram.c in GNU bison when processing a double quote at the end of the string. A remote attacker can trick the victim to open a specially crafted file to the application and perform a denial of service (DoS) attack.
2) 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.