CVE-2011-1002

CVE-2011-1002 is a medium-severity vulnerability in Redhat Enterprise Linux with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 29% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-835.

Key facts

• Severity: Medium (CVSS 2.0 base score 5.0)
• EPSS exploit prediction: 29% (98th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-835
• Affected product: Redhat Enterprise Linux
• Published: 2011-02-22
• Last modified: 2026-06-16

Description

avahi-core/socket.c in avahi-daemon in Avahi before 0.6.29 allows remote attackers to cause a denial of service (infinite loop) via an empty mDNS (1) IPv4 or (2) IPv6 UDP packet to port 5353. NOTE: this vulnerability exists because of an incorrect fix for CVE-2010-2244.

Frequently asked questions

What is CVE-2011-1002?

avahi-core/socket.c in avahi-daemon in Avahi before 0.6.29 allows remote attackers to cause a denial of service (infinite loop) via an empty mDNS (1) IPv4 or (2) IPv6 UDP packet to port 5353. NOTE: this vulnerability exists because of an incorrect fix for CVE-2010-2244.

How severe is CVE-2011-1002?

CVE-2011-1002 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-1002 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 29% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1002?

CVE-2011-1002 primarily affects Redhat Enterprise Linux. In total, 45 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-1002?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-1002 published?

CVE-2011-1002 was published on 2011-02-22 and last updated on 2026-06-16.

References

• http://avahi.org/ticket/325
• http://git.0pointer.de/?p=avahi.git%3Ba=commit%3Bh=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/
• https://bugzilla.redhat.com/show_bug.cgi?id=667187
• https://exchange.xforce.ibmcloud.com/vulnerabilities/65524

Affected products (45)

• cpe:2.3:a:avahi:avahi:*:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.1:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.2:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.3:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.4:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.5:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.5.1:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.5.2:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.1:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.2:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.3:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.4:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.5:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.6:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.7:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.8:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.9:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.10:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.11:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.12:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.13:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.14:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.15:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.16:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.17:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.18:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.19:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.20:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.21:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.22:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.23:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.24:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.25:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.26:*:*:*:*:*:*:*
• cpe:2.3:a:avahi:avahi:0.6.27:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:15:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:lts:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:9.10:*:*:*:*:*:*:*

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