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 200904-05 ] ntp: Certificate validation error
Date: Sun, 05 Apr 2009 13:58:55
Message-Id: 49D8B8A1.1070204@gentoo.org
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2 Gentoo Linux Security Advisory GLSA 200904-05
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4 http://security.gentoo.org/
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6
7 Severity: Normal
8 Title: ntp: Certificate validation error
9 Date: April 05, 2009
10 Bugs: #254098
11 ID: 200904-05
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14
15 Synopsis
16 ========
17
18 An error in the OpenSSL certificate chain validation in ntp might allow
19 for spoofing attacks.
20
21 Background
22 ==========
23
24 ntp contains the client and daemon implementations for the Network Time
25 Protocol.
26
27 Affected packages
28 =================
29
30 -------------------------------------------------------------------
31 Package / Vulnerable / Unaffected
32 -------------------------------------------------------------------
33 1 net-misc/ntp < 4.2.4_p6 >= 4.2.4_p6
34
35 Description
36 ===========
37
38 It has been reported that ntp incorrectly checks the return value of
39 the EVP_VerifyFinal(), a vulnerability related to CVE-2008-5077 (GLSA
40 200902-02).
41
42 Impact
43 ======
44
45 A remote attacker could exploit this vulnerability to spoof arbitrary
46 names to conduct Man-In-The-Middle attacks and intercept sensitive
47 information.
48
49 Workaround
50 ==========
51
52 There is no known workaround at this time.
53
54 Resolution
55 ==========
56
57 All ntp users should upgrade to the latest version:
58
59 # emerge --sync
60 # emerge --ask --oneshot --verbose ">=net-misc/ntp-4.2.4_p6"
61
62 References
63 ==========
64
65 [ 1 ] CVE-2008-5077
66 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5077
67 [ 2 ] CVE-2009-0021
68 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0021
69 [ 3 ] GLSA 200902-02
70 http://www.gentoo.org/security/en/glsa/glsa-200902-02.xml
71
72 Availability
73 ============
74
75 This GLSA and any updates to it are available for viewing at
76 the Gentoo Security Website:
77
78 http://security.gentoo.org/glsa/glsa-200904-05.xml
79
80 Concerns?
81 =========
82
83 Security is a primary focus of Gentoo Linux and ensuring the
84 confidentiality and security of our users machines is of utmost
85 importance to us. Any security concerns should be addressed to
86 security@g.o or alternatively, you may file a bug at
87 http://bugs.gentoo.org.
88
89 License
90 =======
91
92 Copyright 2009 Gentoo Foundation, Inc; referenced text
93 belongs to its owner(s).
94
95 The contents of this document are licensed under the
96 Creative Commons - Attribution / Share Alike license.
97
98 http://creativecommons.org/licenses/by-sa/2.5

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