Bug 1510958 (CVE-2017-15723)

Summary:	CVE-2017-15723 irssi: NULL pointer dereference due to overlong nicks while splitting the message
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	huzaifas, jskarvad, mmahut
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	irssi 1.0.5	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-12-14 10:01:13 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:	1510963
Bug Blocks:	1510960

Description Andrej Nemec 2017-11-08 13:30:00 UTC

In Irssi before 1.0.5, overlong nicks or targets may result in a NULL pointer dereference while splitting the message. This may result in a remote denial of service.

External References:

https://irssi.org/security/irssi_sa_2017_10.txt

Comment 1 Andrej Nemec 2017-11-08 13:32:33 UTC

Created irssi tracking bugs for this issue:

Affects: fedora-all [bug 1510963]

Comment 2 Stefan Cornelius 2017-12-14 10:01:13 UTC

As far as I can tell, this was introduced sometime around version 0.8.17-rc2. The versions we ship are older.

Comment 3 Stefan Cornelius 2017-12-14 10:01:20 UTC

Statement:

This issue did not affect the versions of irssi as shipped with Red Hat Enterprise Linux 6 and 7.