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>> Kerberos V5 "setuid()" and "seteuid()" Calls Handling Local Privilege Escalation Vulnerability

Title : Kerberos V5 "setuid()" and "seteuid()" Calls Handling Local Privilege Escalation Vulnerability
VUPEN ID : VUPEN/ADV-2006-3225
CVE ID : CVE-2006-3083 - CVE-2006-3084
Rated as : Moderate Risk 
Remotely Exploitable : No
Locally Exploitable : Yes
Release Date : 2006-08-09


Technical Description    Receive VUPEN Security alerts in a Text format  Receive VUPEN Security alerts in a PDF format  Receive VUPEN Security alerts in an XML format  Receive VUPEN Security notifications by SMS 

A vulnerability has been identified in Kerberos V5, which could be exploited by malicious users to bypass security restrictions and obtain elevated privileges. This flaw is due to errors in the "krshd" and "v4rcp" applications that do not check the return code of "setuid()" and "seteuid()" calls, which could be exploited by local attackers to disclose or manipulate arbitrary files and execute commands with root privileges.

Affected Products

Kerberos V5 version 1.5 and prior

Solution

Patch for Kerberos V5 1.5 :
http://web.mit.edu/kerberos/advisories/2006-001-patch_1.5.txt

Patch for Kerberos V5 1.4.3 :
http://web.mit.edu/kerberos/advisories/2006-001-patch_1.4.3.txt

References

http://www.vupen.com/english/advisories/2006/3225
http://web.mit.edu/kerberos/www/...s/MITKRB5-SA-2006-001-setuid.txt

Credits

Vulnerability reported by Michael Calmer and Marcus Meissner

ChangeLog

2006-08-09 : Initial release

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