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full-disclosure-uk: [Full-disclosure] [ GLSA 200705-14 ] XScreen

[Full-disclosure] [ GLSA 200705-14 ] XScreenSaver: Privilege escalation

From: Raphael Marichez <falco_at_nospam>
Date: Sun May 13 2007 - 21:35:52 GMT
To: gentoo-announce@gentoo.org

  • - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200705-14
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Severity: Normal Title: XScreenSaver: Privilege escalation Date: May 13, 2007 Bugs: #176584 ID: 200705-14
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Synopsis


XScreenSaver allows local users to bypass authentication under certain configurations.

Background


XScreenSaver is a widely used screen saver collection shipped on systems running the X11 Window System.

Affected packages



Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 x11-misc/xscreensaver < 5.02 >= 5.02

Description


XScreenSaver incorrectly handles the results of the getpwuid() function in drivers/lock.c when using directory servers during a network outage.

Impact


A local user can crash XScreenSaver by preventing network connectivity if the system uses a remote directory service for credentials such as NIS or LDAP, which will unlock the screen.

Workaround


There is no known workaround at this time.

Resolution


All XScreenSaver users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-misc/xscreensaver-5.02"

References


  [ 1 ] CVE-2007-1859
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1859

Availability


This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200705-14.xml

Concerns?


Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.

License


Copyright 2007 Gentoo Foundation, Inc; referenced text belongs to its owner(s).

The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5



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