Bug 1877779 (CVE-2020-24980)

Summary: CVE-2020-24980 bison: Assertion failure in src/parse-gram.c could result in DoS
Product: [Other] Security Response Reporter: Michael Kaplan <mkaplan>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: arjun.is, ashankar, emachado, me, pfrankli, tcullum
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Clone Of: Environment:
Last Closed: 2020-09-15 01:17:44 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1877780    
Bug Blocks: 1877775    

Description Michael Kaplan 2020-09-10 12:24:25 UTC
An assertion failure was found in src/parse-gram.c in GNU bison 3.7.1.1-cb7dc-dirty. A local attacker may execute bison with crafted input file containing character '\' at the end and while still in a character or a string.

References:

https://github.com/akimd/bison/commit/b801b7b670872b8a31d11b3683b4afc3e45a07f8
https://lists.gnu.org/r/bug-bison/2020-08/msg00009.html

Comment 1 Michael Kaplan 2020-09-10 12:24:46 UTC
Created bison tracking bugs for this issue:

Affects: fedora-all [bug 1877780]

Comment 4 Todd Cullum 2020-09-14 22:07:26 UTC
Statement:

This flaw does not affect bison as shipped in Red Hat Enterprise Linux 7 or 8 as it is was introduced in a subsequent version of bison.

Comment 5 Product Security DevOps Team 2020-09-15 01:17:44 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-24980