Input validation error in Avahi

1) Input validation error

EUVDB-ID: #VU45301

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2011-1002

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows remote attackers to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (infinite loop) via an empty mDNS (1) IPv4 or (2) IPv6 UDP packet to port 5353.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Avahi: 0.1 - 0.6.27

External links

http://avahi.org/ticket/325
http://git.0pointer.de/?p=avahi.git;a=commit;h=46109dfec75534fe270c0ab902576f685d5ab3a6
http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055858.html
http://lists.opensuse.org/opensuse-security-announce/2011-04/msg00000.html
http://openwall.com/lists/oss-security/2011/02/18/1
http://openwall.com/lists/oss-security/2011/02/18/4
http://osvdb.org/70948
http://secunia.com/advisories/43361
http://secunia.com/advisories/43465
http://secunia.com/advisories/43605
http://secunia.com/advisories/43673
http://secunia.com/advisories/44131
http://ubuntu.com/usn/usn-1084-1
http://www.debian.org/security/2011/dsa-2174
http://www.mandriva.com/security/advisories?name=MDVSA-2011:037
http://www.mandriva.com/security/advisories?name=MDVSA-2011:040
http://www.openwall.com/lists/oss-security/2011/02/22/9
http://www.redhat.com/support/errata/RHSA-2011-0436.html
http://www.redhat.com/support/errata/RHSA-2011-0779.html
http://www.securityfocus.com/bid/46446
http://www.vupen.com/english/advisories/2011/0448
http://www.vupen.com/english/advisories/2011/0499
http://www.vupen.com/english/advisories/2011/0511
http://www.vupen.com/english/advisories/2011/0565
http://www.vupen.com/english/advisories/2011/0601
http://www.vupen.com/english/advisories/2011/0670
http://www.vupen.com/english/advisories/2011/0969
http://xorl.wordpress.com/2011/02/20/cve-2011-1002-avahi-daemon-remote-denial-of-service/
http://bugzilla.redhat.com/show_bug.cgi?id=667187
http://exchange.xforce.ibmcloud.com/vulnerabilities/65524
http://exchange.xforce.ibmcloud.com/vulnerabilities/65525

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.