Gentoo Archives: gentoo-announce

From: Kristian Fiskerstrand <k_f@g.o>
To: gentoo-announce@g.o
Subject: [gentoo-announce] [ GLSA 201408-14 ] stunnel: Information disclosure
Date: Fri, 29 Aug 2014 19:12:51
Message-Id: 5400CE5F.3020809@gentoo.org
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2 Gentoo Linux Security Advisory GLSA 201408-14
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4 http://security.gentoo.org/
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6
7 Severity: Normal
8 Title: stunnel: Information disclosure
9 Date: August 29, 2014
10 Bugs: #503506
11 ID: 201408-14
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14
15 Synopsis
16 ========
17
18 A vulnerability in stunnel might allow remote attackers to gain access
19 to private key information.
20
21 Background
22 ==========
23
24 The stunnel program is designed to work as an SSL encryption wrapper
25 between a client and a local or remote server.
26
27 Affected packages
28 =================
29
30 -------------------------------------------------------------------
31 Package / Vulnerable / Unaffected
32 -------------------------------------------------------------------
33 1 net-misc/stunnel < 5.02 >= 5.02
34
35 Description
36 ===========
37
38 stunnel does not properly update the state of the pseudo-random
39 generator after fork-threading which causes subsequent children with
40 the same process ID to use the same entropy pool. ECDSA and DSA keys,
41 when not used in deterministic mode (RFC6979), rely on random data for
42 its k parameter to not leak private key information.
43
44 Impact
45 ======
46
47 A remote attacker may gain access to private key information from ECDSA
48 or DSA keys.
49
50 Workaround
51 ==========
52
53 There is no known workaround at this time.
54
55 Resolution
56 ==========
57
58 All stunnel users should upgrade to the latest version:
59
60 # emerge --sync
61 # emerge --ask --oneshot --verbose ">=net-misc/stunnel-5.02"
62
63 References
64 ==========
65
66 [ 1 ] CVE-2014-0016
67 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-0016
68
69 Availability
70 ============
71
72 This GLSA and any updates to it are available for viewing at
73 the Gentoo Security Website:
74
75 http://security.gentoo.org/glsa/glsa-201408-14.xml
76
77 Concerns?
78 =========
79
80 Security is a primary focus of Gentoo Linux and ensuring the
81 confidentiality and security of our users' machines is of utmost
82 importance to us. Any security concerns should be addressed to
83 security@g.o or alternatively, you may file a bug at
84 https://bugs.gentoo.org.
85
86 License
87 =======
88
89 Copyright 2014 Gentoo Foundation, Inc; referenced text
90 belongs to its owner(s).
91
92 The contents of this document are licensed under the
93 Creative Commons - Attribution / Share Alike license.
94
95 http://creativecommons.org/licenses/by-sa/2.5

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