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TITLE:
sudo "sudo_debug()" Format String Privilege Escalation Vulnerability

SECUNIA ADVISORY ID:
SA47743

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/47743/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=47743

RELEASE DATE:
2012-01-31

DISCUSS ADVISORY:
http://secunia.com/advisories/47743/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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http://secunia.com/advisories/47743/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=47743

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http://secunia.com/vulnerability_scanning/personal/
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DESCRIPTION:
joernchen has discovered a vulnerability in sudo, which can be
exploited by malicious, local users to gain escalated privileges.

The vulnerability is caused due to a format string error within the
"sudo_debug()" function (src/sudo.c) when processing the program's
name. This can be exploited by e.g. symlinking the sudo binary to a
file with a specially crafted filename containing format specifiers
and then executing the maliciously named symlink.

The vulnerability is confirmed in version 1.8.3p1 and reported in
versions 1.8.0 through 1.8.3p1.

SOLUTION:
Update to version 1.8.3p2.

PROVIDED AND/OR DISCOVERED BY:
joernchen

ORIGINAL ADVISORY:
sudo:
http://www.sudo.ws/sudo/alerts/sudo_debug.html

joernchen:
http://seclists.org/fulldisclosure/2012/Jan/att-590/advisory_sudo.txt

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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