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TITLE:
Sudo Netmask Matching Security Bypass Vulnerability

SECUNIA ADVISORY ID:
SA49219

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/49219/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=49219

RELEASE DATE:
2012-05-17

DISCUSS ADVISORY:
http://secunia.com/advisories/49219/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/49219/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=49219

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
A vulnerability has been reported in Sudo, which can be exploited by
malicious users to bypass certain security restrictions.

The vulnerability is caused due to an error within the network
matching mechanism when processing hosts based on the IPv4 netmask.
This can be exploited to execute commands from otherwise restricted
hosts.

Successful exploitation requires that the user exists in the sudoers
file and is granted access to commands on hosts on one or more IPv4
networks.

The vulnerability is reported in versions 1.6.9p3 through 1.8.4p4.

SOLUTION:
Update to version 1.8.4p5 or 1.7.9p1.

PROVIDED AND/OR DISCOVERED BY:
Jan Lieskovsky in a Red Hat bug.

ORIGINAL ADVISORY:
Sudo:
http://www.sudo.ws/sudo/alerts/netmask.html

Red Hat:
https://bugzilla.redhat.com/show_bug.cgi?id=820677

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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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/advisories/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/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.

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