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 200706-01 ] libexif: Integer overflow vulnerability
Date: Tue, 05 Jun 2007 19:12:51
Message-Id: 20070605185832.GE26847@falco.falcal.net
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2 Gentoo Linux Security Advisory GLSA 200706-01
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4 http://security.gentoo.org/
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6
7 Severity: Normal
8 Title: libexif: Integer overflow vulnerability
9 Date: June 05, 2007
10 Bugs: #178081
11 ID: 200706-01
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14
15 Synopsis
16 ========
17
18 libexif fails to handle Exif (EXchangeable Image File) data inputs,
19 making it vulnerable to an integer overflow.
20
21 Background
22 ==========
23
24 libexif is a library for parsing, editing and saving Exif data.
25
26 Affected packages
27 =================
28
29 -------------------------------------------------------------------
30 Package / Vulnerable / Unaffected
31 -------------------------------------------------------------------
32 1 media-libs/libexif < 0.6.15 >= 0.6.15
33
34 Description
35 ===========
36
37 Victor Stinner reported an integer overflow in the
38 exif_data_load_data_entry() function from file exif-data.c while
39 handling Exif data.
40
41 Impact
42 ======
43
44 An attacker could entice a user to process a file with specially
45 crafted Exif extensions with an application making use of libexif,
46 which will trigger the integer overflow and potentially execute
47 arbitrary code or crash the application.
48
49 Workaround
50 ==========
51
52 There is no known workaround at this time.
53
54 Resolution
55 ==========
56
57 All libexif users should upgrade to the latest version. Please note
58 that users upgrading from "<=media-libs/libexif-0.6.13" should also run
59 revdep-rebuild after their upgrade.
60
61 # emerge --sync
62 # emerge --ask --oneshot --verbose ">=media-libs/libexif-0.6.15"
63 # revdep-rebuild --library=/usr/lib/libexif.so
64
65 References
66 ==========
67
68 [ 1 ] CVE-2007-2645
69 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2645
70
71 Availability
72 ============
73
74 This GLSA and any updates to it are available for viewing at
75 the Gentoo Security Website:
76
77 http://security.gentoo.org/glsa/glsa-200706-01.xml
78
79 Concerns?
80 =========
81
82 Security is a primary focus of Gentoo Linux and ensuring the
83 confidentiality and security of our users machines is of utmost
84 importance to us. Any security concerns should be addressed to
85 security@g.o or alternatively, you may file a bug at
86 http://bugs.gentoo.org.
87
88 License
89 =======
90
91 Copyright 2007 Gentoo Foundation, Inc; referenced text
92 belongs to its owner(s).
93
94 The contents of this document are licensed under the
95 Creative Commons - Attribution / Share Alike license.
96
97 http://creativecommons.org/licenses/by-sa/2.5