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TITLE:
Avahi Empty UDP Packet Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA43361

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/43361/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43361

RELEASE DATE:
2011-03-03

DISCUSS ADVISORY:
http://secunia.com/advisories/43361/#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/43361/

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=43361

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 Avahi, which can be exploited by
malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error when processing certain
UDP packets, which can be exploited to trigger an infinite loop by
e.g. sending an empty packet to port 5353/UDP.

The vulnerability is reported in version 0.6.24 and later.

SOLUTION:
Fixed in the GIT repository.

Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

PROVIDED AND/OR DISCOVERED BY:
Reported in a Red Hat bug by "nuh".

ORIGINAL ADVISORY:
Avahi:
http://www.avahi.org/ticket/325
http://git.0pointer.de/?p=avahi.git;a=commitdiff;h=46109dfec75534fe270c0ab902576f685d5ab3a6

Red Hat Bug #667187:
https://bugzilla.redhat.com/show_bug.cgi?id=667187

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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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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