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Fencer Intel
medium 5.0

CVE-2011-1002 json

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 empt…

published 2011-02-22 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-1019

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
29.4%
EPSS 29.4% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

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.

Patch / fix

  • avahi Debian 14, Debian 13, Debian 12 0.6.28-4

debian advisories DEBIAN-CVE-2011-1002

  • avahi RHEL 6 0.6.25-11.el6
  • avahi-ui RHEL 6 0.6.25-11.el6
  • avahi-qt3 RHEL 6 0.6.25-11.el6
  • avahi-qt4 RHEL 6 0.6.25-11.el6
  • avahi-glib RHEL 6 0.6.25-11.el6
  • avahi-libs RHEL 6 0.6.25-11.el6
  • avahi-tools RHEL 6 0.6.25-11.el6
  • avahi-autoipd RHEL 6 0.6.25-11.el6

red hat advisories RHSA-2011:0779RHSA-2011:0436

  • avahi openSUSE Tumbleweed 0.6.32-2.3

opensuse advisories openSUSE-SU-2024:10363-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-1002 updated cvss 3.3

avahi: daemon infinite loop triggered by an empty UDP packet (CVE-2010-2244 fix regression)

  • Red Hat Enterprise Linux (v. 5.6.z server) avahi 0.6.16-10.el5_6, avahi-qt3 0.6.16-10.el5_6, avahi-glib 0.6.16-10.el5_6, avahi-tools 0.6.16-10.el5_6, avahi-compat-howl 0.6.16-10.el5_6, avahi-compat-libdns_sd 0.6.16-10.el5_6
    fixed: vendor fix RHSA-2011:0436
  • Red Hat Enterprise Linux Desktop (v. 6) avahi 0.6.25-11.el6, avahi-ui 0.6.25-11.el6, avahi-glib 0.6.25-11.el6, avahi-libs 0.6.25-11.el6, avahi-tools 0.6.25-11.el6, avahi-autoipd 0.6.25-11.el6, +1 more Red Hat Enterprise Linux Desktop Optional (v. 6) avahi 0.6.25-11.el6, avahi-ui 0.6.25-11.el6, avahi-qt3 0.6.25-11.el6, avahi-qt4 0.6.25-11.el6, avahi-gobject 0.6.25-11.el6, avahi-dnsconfd 0.6.25-11.el6, +3 more Red Hat Enterprise Linux HPC Node (v. 6) avahi 0.6.25-11.el6, avahi-libs 0.6.25-11.el6, avahi-tools 0.6.25-11.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) avahi 0.6.25-11.el6, avahi-ui 0.6.25-11.el6, avahi-qt3 0.6.25-11.el6, avahi-qt4 0.6.25-11.el6, avahi-glib 0.6.25-11.el6, avahi-autoipd 0.6.25-11.el6, +5 more Red Hat Enterprise Linux Server (v. 6) avahi 0.6.25-11.el6, avahi-ui 0.6.25-11.el6, avahi-glib 0.6.25-11.el6, avahi-libs 0.6.25-11.el6, avahi-tools 0.6.25-11.el6, avahi-autoipd 0.6.25-11.el6, +1 more Red Hat Enterprise Linux Server Optional (v. 6) avahi 0.6.25-11.el6, avahi-ui 0.6.25-11.el6, avahi-qt3 0.6.25-11.el6, avahi-qt4 0.6.25-11.el6, avahi-gobject 0.6.25-11.el6, avahi-dnsconfd 0.6.25-11.el6, +3 more
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 6) avahi 0.6.25-11.el6, avahi-ui 0.6.25-11.el6, avahi-glib 0.6.25-11.el6, avahi-libs 0.6.25-11.el6, avahi-tools 0.6.25-11.el6, avahi-autoipd 0.6.25-11.el6, +1 more Red Hat Enterprise Linux Workstation Optional (v. 6) avahi 0.6.25-11.el6, avahi-ui 0.6.25-11.el6, avahi-qt3 0.6.25-11.el6, avahi-qt4 0.6.25-11.el6, avahi-gobject 0.6.25-11.el6, avahi-dnsconfd 0.6.25-11.el6, +3 more
    fixed: vendor fix RHSA-2011:0779

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

29.36% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • xorl.wordpress.com http://xorl.wordpress.com/2011/02/20/cve-2011-1002-avahi-daemon-remote-denial-of-service/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-835 Loop with Unreachable Exit Condition

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.