Vulnerability identifier: #VU46311
Vulnerability risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
GNU Bison
Other software /
Other software solutions
Vendor: GNU
Description
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.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
GNU Bison: 3.7 - 3.7.1
External links
http://github.com/akimd/bison/commit/b801b7b670872b8a31d11b3683b4afc3e45a07f8
http://lists.gnu.org/r/bug-bison/2020-08/msg00009.html
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.