Bug 1576640 (CVE-2018-10771)

Summary:	CVE-2018-10771 abcm2ps: Stack-based buffer overflow in parse.c:get_key() allows for denial of service
Product:	[Other] Security Response	Reporter:	Sam Fowler <sfowler>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	gemi
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	abcm2ps 8.13.21	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:22:34 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1576641
Bug Blocks:

Description Sam Fowler 2018-05-10 03:24:49 UTC

Abcm2ps before version 8.13.21 is vulnerable to a stack-based buffer overflow in the parse.c:get_key() function. An attacker could exploit this to cause a denial of service via crafted file.


Upstream issue:

https://github.com/leesavide/abcm2ps/issues/17


Upstream patch:

https://github.com/leesavide/abcm2ps/commit/dc0372993674d0b50fedfbf7b9fad1239b8efc5f

Comment 1 Sam Fowler 2018-05-10 03:25:06 UTC

Created abcm2ps tracking bugs for this issue:

Affects: fedora-all [bug 1576641]

Comment 2 Sam Fowler 2018-05-10 03:28:37 UTC

Couldn't reproduce this with abcm2ps-7.8.14-5.fc27.src.rpm on F27:

$ gdb -q abcm2ps
Reading symbols from abcm2ps...done.
(gdb) r ~/Downloads/abcm2ps/POC2 
Starting program: /home/sfowler/rpmbuild/BUILD/abcm2ps-7.8.14/abcm2ps ~/Downloads/abcm2ps/POC2
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
abcm2ps-7.8.14 (March 25, 2015)
File /home/sfowler/Downloads/abcm2ps/POC2
Error in line 6.2: Bad character
   6 [1�
       ^
   - In tune '':
Error in line 5.0: w: without music
Output written on Out.ps (1 page, 1 title, 18271 bytes)
[Inferior 1 (process 16672) exited with code 01

Comment 3 Product Security DevOps Team 2019-06-10 10:22:34 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.