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TITLE:
libvirt "bridge" Forward Mode Firewall Rules Weakness

SECUNIA ADVISORY ID:
SA47463

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/47463/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=47463

RELEASE DATE:
2012-01-10

DISCUSS ADVISORY:
http://secunia.com/advisories/47463/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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 * CVE Reference(s)

http://secunia.com/advisories/47463/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=47463

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http://secunia.com/vulnerability_scanning/personal/
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DESCRIPTION:
A weakness has been reported in libvirt, which can be exploited by
malicious people to bypass certain security restrictions.

The weakness is caused due to libvirt incorrectly inserting certain
firewall rules, which can lead to unintended access to ports 53 and
67.

Successful exploitation requires that a libvirt network with "bridge"
forward mode is defined and started and that libvirtd is restarted.

The weakness is reported in version 0.9.4 through 0.9.8.

SOLUTION:
Update to version 0.9.9.

PROVIDED AND/OR DISCOVERED BY:
David Jaša

ORIGINAL ADVISORY:
Red Hat bug #760442:
https://bugzilla.redhat.com/show_bug.cgi?id=760442

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
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