Bug 212057

Summary:	CVE-2006-4573 screen buffer overflow
Product:	[Fedora] Fedora	Reporter:	Josh Bressers <bressers>
Component:	screen	Assignee:	Marcela Mašláňová <mmaslano>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Brock Organ <borgan>
Severity:	low	Docs Contact:
Priority:	medium
Version:	6	CC:	gajownik
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
URL:	http://lists.gnu.org/archive/html/screen-users/2006-10/msg00028.html
Whiteboard:	source=vendorsec,reported=20061023,impact=low,public=20061023
Fixed In Version:	screen-4.0.3-1.fc6	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-12-11 14:06:18 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:

Description Josh Bressers 2006-10-24 19:43:59 UTC

+++ This bug was initially created as a clone of Bug #212056 +++

From the screen-users mailing list:

    I've just released screen-4.0.3. This is not the promised next version
    with vertical split and other cool things, but just a security release
    that fixes two bugs in the utf8 combining characters handling. The
    bugs could be used to crash/hang screen by writing a special string
    to a window.

    The fixed version is (as usual) available via:

    ftp://ftp.uni-erlangen.de/pub/utilities/screen/screen-4.0.3.tar.gz

    Credits go to cstone & Rich Felker for finding the bugs.

Kees Cook of Ubuntu analysed this issue and determined that it's likely an
exploitable issue, but it's non trivial to exploit.  This will require a fair
amount of user interaction to exploit, thus the low severity.

This issue also affects FC5

Comment 1 Marcela Mašláňová 2006-11-15 10:33:38 UTC

Now I make it for devel. I'll update FC-6 soon.