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Gentoo 201201-15 High: ktsuss Privilege Escalation Alert

gentoo
Calendar Grey January 27, 2012
Dist Gentoo Esm H88
Nearby intruders could potentially take advantage of ktsuss flaws within Gentoo systems, leading to higher access privileges. Immediate response advised.
Two vulnerabilities have been found in ktsuss, allowing local attackers to gain escalated privileges.

Summary

Two vulnerabilities have been found in ktuss: * Under specific circumstances, ktsuss skips authentication and fails to change the effective UID back to the real UID (CVE-2011-2921). * The GTK interface spawned by the ktsuss binary is run as root (CVE-2011-2922).

Topics%20covered

Topics Covered

security advisory high severity gentoo privilege escalation local attack

Resolution

Gentoo discontinued support for ktsuss. We recommend that users unmerge ktsuss: # emerge --unmerge "x11-misc/ktsuss"

References

[ 1 ] CVE-2011-2921 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2921 [ 2 ] CVE-2011-2922 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2922

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201201-15
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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 https://bugs.gentoo.org.

Severity: High
Title: ktsuss: Privilege escalation
Date: January 27, 2012
Bugs: #381115
ID: 201201-15

Topics%20covered

Topics Covered

security advisory high severity gentoo privilege escalation local attack

Synopsis

Two vulnerabilities have been found in ktsuss, allowing local attackersto gain escalated privileges.

Background

ktsuss is a simple, graphical version of su written in C and GTK+.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 x11-misc/ktsuss <= 1.4 Vulnerable! ------------------------------------------------------------------- NOTE: Certain packages are still vulnerable. Users should migrate to another package if one is available or wait for the existing packages to be marked stable by their architecture maintainers.

Impact

===== A local attacker could gain escalated privileges and use the "GTK_MODULES" environment variable to possibly execute arbitrary code with root privileges.

Workaround

There is no known workaround at this time.

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