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TITLE: Heimdal setuid Security Issue
SECUNIA ADVISORY ID: SA21436
VERIFY ADVISORY: http://secunia.com/advisories/21436/
CRITICAL: Less critical
IMPACT: Privilege escalation
WHERE: Local system
SOFTWARE: Heimdal 0.5.x http://secunia.com/product/3298/ Heimdal 0.6.x http://secunia.com/product/3299/ Heimdal 0.7.x http://secunia.com/product/7707/
DESCRIPTION: A security issue has been reported in Heimdal, which potentially can be exploited by malicious, local users to perform certain actions with escalated privileges.
The security issue is caused due to missing checks for whether the "setuid()" call has succeeded in the bundled rcp application. This may be exploited to perform certain actions with root privileges if the "setuid()" call fails due to e.g. resource limits.
NOTE: This is currently only known to affect the Linux and AIX operating systems.
Successful exploitation requires that "rcp" is installed setuid root (not installed by default).
It has also been reported that similar missing checks exists for the "seteuid()" call in some bundled applications. However, this is currently not known to affect any operating systems.
The security issue has been reported in version 0.7.2. Prior versions may also be affected.
SOLUTION: Apply patch for version 0.7.2: ftp://ftp.pdc.kth.se/pub/heimdal/src/heimdal-0.7.2-setuid-patch.txt
PROVIDED AND/OR DISCOVERED BY: The vendor credits: * Tom Yu, MIT * Michael Calmer and Marcus Meissner, SUSE
ORIGINAL ADVISORY: http://www.pdc.kth.se/heimdal/advisory/2006-08-08/
About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities.
Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/
Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor.