Bug 867908 (CVE-2012-4524) - CVE-2012-4524 xlockmore: Screensaver crash (screen lock bypass) when 'dclock' mode used
Summary: CVE-2012-4524 xlockmore: Screensaver crash (screen lock bypass) when 'dclock'...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2012-4524
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 867910 867911
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-10-18 14:36 UTC by Jan Lieskovsky
Modified: 2019-09-29 12:56 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-05-08 17:35:01 UTC
Embargoed:


Attachments (Terms of Use)
Local copy of the proposed preliminary patch from [1] (1.46 KB, patch)
2012-10-18 14:39 UTC, Jan Lieskovsky
no flags Details | Diff

Description Jan Lieskovsky 2012-10-18 14:36:25 UTC
A denial of service flaw was found in the way xlockmore, X screen lock and screen saver, performed passing arguments to underlying localtime() call, when the 'dlock' mode was used. An attacker could use this flaw to potentially obtain unauthorized access to screen / graphical session, previously locked by another user / victim.

CVE request (containing also patch proposal):
[1] http://www.openwall.com/lists/oss-security/2012/10/17/10

Comment 1 Jan Lieskovsky 2012-10-18 14:39:58 UTC
Created attachment 629482 [details]
Local copy of the proposed preliminary patch from [1]

Comment 2 Jan Lieskovsky 2012-10-18 14:41:06 UTC
This issue affects the versions of the xlockmore package, as shipped with Fedora release of 16 and 17. Please schedule an update.

--

This issue affects the version of the xlockmore package, as shipped with Fedora EPEL 6. Please schedule an update.

Comment 3 Jan Lieskovsky 2012-10-18 14:42:42 UTC
Created xlockmore tracking bugs for this issue

Affects: fedora-all [bug 867910]
Affects: epel-6 [bug 867911]

Comment 4 Fedora Update System 2012-11-20 19:40:33 UTC
xlockmore-5.40-4.el6 has been pushed to the Fedora EPEL 6 stable repository.  If problems still persist, please make note of it in this bug report.


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