Vulnerability CVE-2020-24979


Published: 2020-09-04

Description:
A Buffer Overflow vulnerability was found in src/symtab.c in GNU bison 3.7.1.1-cb7dc-dirty. A local attacker may execute bison with crafted input file redefining the EOF token, which could triggers Heap buffer overflow and thus cause system crash.

Type:

CWE-787

CVSS2 => (AV:L/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
2.1/10
2.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
GNU -> Bison 

 References:
https://github.com/akimd/bison/commit/bfd851e2d621734886c66c0af26e861e718510b2
https://lists.gnu.org/r/bug-bison/2020-08/msg00008.html

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