Bug 1410821 (CVE-2017-5193)

Summary:	CVE-2017-5193 irssi: Null pointer dereference in the nickcmp function
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	huzaifas, jskarvad, mmahut, rosser.bjr
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	irssi 0.8.21, irssi 1.0.0	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-02-21 17:19:17 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:	1410829, 1410830
Bug Blocks:	1410833

Description Andrej Nemec 2017-01-06 15:11:32 UTC

A null pointer dereference vulnerability was found in irssi.

External References:

https://irssi.org/security/irssi_sa_2017_01.txt

Upstream patch:

https://github.com/irssi/irssi/commit/6c6c42e3d1b49d90aacc0b67f8540471cae02a1d

CVE assignment:

http://seclists.org/oss-sec/2017/q1/26

Comment 1 Andrej Nemec 2017-01-06 15:19:58 UTC

Created irssi tracking bugs for this issue:

Affects: fedora-all [bug 1410829]
Affects: epel-5 [bug 1410830]

Comment 2 Cedric Buissart 2017-02-21 16:42:15 UTC

* A rogue IRC server is required to be able to crash irssi via this vulnerability. An attacker would need to either gain control of a IRC server, or trick the user into connecting a rogue IRC server => Lowering the severity due to access complexity.

* From the upstream patch, only the part concerning src/irc/core/irc-queries.c file refers to this vulnerability.

Comment 4 Cedric Buissart 2017-02-21 17:19:02 UTC

Statement:

Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.