Bug 188802

Summary: CVE-2006-1730 CSS Letter-Spacing Heap Overflow Vulnerability
Product: [Fedora] Fedora Reporter: Josh Bressers <bressers>
Component: mozillaAssignee: Christopher Aillon <caillon>
Status: CLOSED ERRATA QA Contact: Ben Levenson <benl>
Severity: urgent Docs Contact:
Priority: medium    
Version: 5CC: deisenst, security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: reported=20060412,source=mozilla,embargo=yes,impact=critical
Fixed In Version: FEDORA-2006-487 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2006-06-24 16:25:38 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 2006-04-13 02:28:12 UTC 
CSS Letter-Spacing Heap Overflow Vulnerability


An  anonymous  researcher for TippingPoint and the Zero Day Initiative
discovered an integer overflow triggered by the CSS letter-spacing property.
This results in in under-allocating memory and ultimately a heap buffer
overflow which could be exploited to run code of the attacker's choice.

The overflow condition itself does not require JavaScript and thus could
affect Thunderbird via received mail, but without scripting to prepare
memory it may not be possible to exploit this condition in mail.

Workaround

Upgrade to the fixed version.

References

[1]ZDI-06-009
[2]https://bugzilla.mozilla.org/show_bug.cgi?id=325403


This issue also affects FC4
Comment 1 Josh Bressers 2006-04-24 12:49:18 UTC 
Lifting embargo
Comment 2 David Eisenstein 2006-06-24 16:25:38 UTC 
This bug was fixed for FC4 in Fedora Update FEDORA-2006-488
<http://www.redhat.com/archives/fedora-package-announce/2006-May/msg00019.html>.

This bug was fixed for FC5 in Fedora Update FEDORA-2006-487
<http://www.redhat.com/archives/fedora-package-announce/2006-May/msg00018.html>.