CVE-2020-24240

State: Published
Severity: Not scored
Published: Aug 25, 2020
Updated: Aug 4, 2024
Reserved: Aug 13, 2020

Description

GNU Bison before 3.7.1 has a use-after-free in _obstack_free in lib/obstack.c (called from gram_lex) when a '\0' byte is encountered. NOTE: there is a risk only if Bison is used with untrusted input, and the observed bug happens to cause unsafe behavior with a specific compiler/architecture. The bug report was intended to show that a crash may occur in Bison itself, not that a crash may occur in code that is generated by Bison.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
n/an/a	n/aAffected

References

https://github.com/akimd/bison/commit/be95a4fe2951374676efc9454ffee8638faaf68d
https://lists.gnu.org/r/bug-bison/2020-07/msg00051.html
https://github.com/akimd/bison/compare/v3.7...v3.7.1

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