Gentoo Archives: gentoo-announce

From: Pierre-Yves Rofes <py@g.o>
To: gentoo-announce@l.g.o
Cc: full-disclosure@××××××××××××××.uk, bugtraq@×××××××××××××.com, security-alerts@×××××××××××××.com
Subject: [gentoo-announce] [ GLSA 200901-11 ] Avahi: Denial of Service
Date: Wed, 14 Jan 2009 23:06:17
Message-Id: 496E6FBF.6020308@gentoo.org
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2 Gentoo Linux Security Advisory GLSA 200901-11
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4 http://security.gentoo.org/
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6
7 Severity: Normal
8 Title: Avahi: Denial of Service
9 Date: January 14, 2009
10 Bugs: #250913
11 ID: 200901-11
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14
15 Synopsis
16 ========
17
18 A Denial of Service vulnerability has been discovered in Avahi.
19
20 Background
21 ==========
22
23 Avahi is a system that facilitates service discovery on a local
24 network.
25
26 Affected packages
27 =================
28
29 -------------------------------------------------------------------
30 Package / Vulnerable / Unaffected
31 -------------------------------------------------------------------
32 1 net-dns/avahi < 0.6.24 >= 0.6.24
33
34 Description
35 ===========
36
37 Hugo Dias reported a failed assertion in the
38 originates_from_local_legacy_unicast_socket() function in
39 avahi-core/server.c when processing mDNS packets with a source port of
40 0.
41
42 Impact
43 ======
44
45 A remote attacker could send specially crafted packets to the daemon,
46 leading to its crash.
47
48 Workaround
49 ==========
50
51 There is no known workaround at this time.
52
53 Resolution
54 ==========
55
56 All Avahi users should upgrade to the latest version:
57
58 # emerge --sync
59 # emerge --ask --oneshot --verbose ">=net-dns/avahi-0.6.24"
60
61 References
62 ==========
63
64 [ 1 ] CVE-2008-5081
65 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5081
66
67 Availability
68 ============
69
70 This GLSA and any updates to it are available for viewing at
71 the Gentoo Security Website:
72
73 http://security.gentoo.org/glsa/glsa-200901-11.xml
74
75 Concerns?
76 =========
77
78 Security is a primary focus of Gentoo Linux and ensuring the
79 confidentiality and security of our users machines is of utmost
80 importance to us. Any security concerns should be addressed to
81 security@g.o or alternatively, you may file a bug at
82 http://bugs.gentoo.org.
83
84 License
85 =======
86
87 Copyright 2009 Gentoo Foundation, Inc; referenced text
88 belongs to its owner(s).
89
90 The contents of this document are licensed under the
91 Creative Commons - Attribution / Share Alike license.
92
93 http://creativecommons.org/licenses/by-sa/2.5

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