Gentoo Archives: gentoo-announce

From: Kristian Fiskerstrand <k_f@g.o>
To: gentoo-announce@l.g.o
Subject: [gentoo-announce] [ GLSA 201706-22 ] libksba: Denial of Service and information disclosure
Date: Thu, 22 Jun 2017 17:47:22
Message-Id: 7fddc67a-be9e-08bd-838e-64fd4897a1e6@gentoo.org
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2 Gentoo Linux Security Advisory GLSA 201706-22
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4 https://security.gentoo.org/
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6
7 Severity: Normal
8 Title: libksba: Denial of Service and information disclosure
9 Date: June 22, 2017
10 Bugs: #592078
11 ID: 201706-22
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14
15 Synopsis
16 ========
17
18 Multiple vulnerabilities have been found in libksba which might allow
19 remote attackers to obtain sensitive information or crash an
20 libksba-based application.
21
22 Background
23 ==========
24
25 Libksba is a X.509 and CMS (PKCS#7) library.
26
27 Affected packages
28 =================
29
30 -------------------------------------------------------------------
31 Package / Vulnerable / Unaffected
32 -------------------------------------------------------------------
33 1 dev-libs/libksba < 1.3.5 >= 1.3.5
34
35 Description
36 ===========
37
38 It was found that an unproportionate amount of memory is allocated when
39 parsing crafted certificates in libskba, which may lead to Denial of
40 Service condition.
41
42 Moreover in libksba 1.3.4, allocated memory is uninitialized and could
43 potentially contain sensitive data left in freed memory block.
44
45 Impact
46 ======
47
48 A remote attacker, able to interact with an libksba-based application,
49 could possibly obtain sensitive information or cause a Denial of
50 Service condition.
51
52 Workaround
53 ==========
54
55 There is no known workaround at this time.
56
57 Resolution
58 ==========
59
60 All libksba users should upgrade to the latest version:
61
62 # emerge --sync
63 # emerge --ask --oneshot --verbose ">=dev-libs/libksba-1.3.5"
64
65 References
66 ==========
67
68 [ 1 ] CVE-2016-4579
69 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-4579
70 [ 2 ] Upstream report
71 http://seclists.org/oss-sec/2016/q3/343
72
73 Availability
74 ============
75
76 This GLSA and any updates to it are available for viewing at
77 the Gentoo Security Website:
78
79 https://security.gentoo.org/glsa/201706-22
80
81 Concerns?
82 =========
83
84 Security is a primary focus of Gentoo Linux and ensuring the
85 confidentiality and security of our users' machines is of utmost
86 importance to us. Any security concerns should be addressed to
87 security@g.o or alternatively, you may file a bug at
88 https://bugs.gentoo.org.
89
90 License
91 =======
92
93 Copyright 2017 Gentoo Foundation, Inc; referenced text
94 belongs to its owner(s).
95
96 The contents of this document are licensed under the
97 Creative Commons - Attribution / Share Alike license.
98
99 http://creativecommons.org/licenses/by-sa/2.5

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