Gentoo Archives: gentoo-announce

From: Raphael Marichez <falco@g.o>
To: gentoo-announce@g.o
Cc: bugtraq@×××××××××××××.com, full-disclosure@××××××××××××××.uk, security-alerts@×××××××××××××.com
Subject: [gentoo-announce] [ GLSA 200705-24 ] libpng: Denial of Service
Date: Thu, 31 May 2007 18:40:20
Message-Id: 20070531181258.GC14304@falco.falcal.net
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2 Gentoo Linux Security Advisory GLSA 200705-24
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4 http://security.gentoo.org/
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6
7 Severity: Normal
8 Title: libpng: Denial of Service
9 Date: May 31, 2007
10 Bugs: #178004
11 ID: 200705-24
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14
15 Synopsis
16 ========
17
18 A vulnerability in libpng may allow a remote attacker to crash
19 applications that handle untrusted images.
20
21 Background
22 ==========
23
24 libpng is a free ANSI C library used to process and manipulate PNG
25 images.
26
27 Affected packages
28 =================
29
30 -------------------------------------------------------------------
31 Package / Vulnerable / Unaffected
32 -------------------------------------------------------------------
33 1 media-libs/libpng < 1.2.17 >= 1.2.17
34
35 Description
36 ===========
37
38 Mats Palmgren fixed an error in file pngrutil.c in which the trans[]
39 array might be not allocated because of images with a bad tRNS chunk
40 CRC value.
41
42 Impact
43 ======
44
45 A remote attacker could craft an image that when processed or viewed by
46 an application using libpng causes the application to terminate
47 abnormally.
48
49 Workaround
50 ==========
51
52 There is no known workaround at this time.
53
54 Resolution
55 ==========
56
57 Please note that due to separate bugs in libpng 1.2.17, Gentoo does not
58 provide libpng-1.2.17 but libpng-1.2.18. All libpng users should
59 upgrade to the latest version:
60
61 # emerge --sync
62 # emerge --ask --oneshot --verbose ">=media-libs/libpng-1.2.18"
63
64 References
65 ==========
66
67 [ 1 ] CVE-2007-2445
68 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2445
69
70 Availability
71 ============
72
73 This GLSA and any updates to it are available for viewing at
74 the Gentoo Security Website:
75
76 http://security.gentoo.org/glsa/glsa-200705-24.xml
77
78 Concerns?
79 =========
80
81 Security is a primary focus of Gentoo Linux and ensuring the
82 confidentiality and security of our users machines is of utmost
83 importance to us. Any security concerns should be addressed to
84 security@g.o or alternatively, you may file a bug at
85 http://bugs.gentoo.org.
86
87 License
88 =======
89
90 Copyright 2007 Gentoo Foundation, Inc; referenced text
91 belongs to its owner(s).
92
93 The contents of this document are licensed under the
94 Creative Commons - Attribution / Share Alike license.
95
96 http://creativecommons.org/licenses/by-sa/2.5