Gentoo Archives: gentoo-announce

From: Chris Reffett <creffett@g.o>
To: gentoo-announce@g.o
Subject: [gentoo-announce] [ GLSA 201309-20 ] Dropbear: Multiple vulnerabilities
Date: Fri, 27 Sep 2013 00:14:22
Message-Id: 5244CD84.3060702@gentoo.org
1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
2 Gentoo Linux Security Advisory GLSA 201309-20
3 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
4 http://security.gentoo.org/
5 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
6
7 Severity: Normal
8 Title: Dropbear: Multiple vulnerabilities
9 Date: September 26, 2013
10 Bugs: #328409, #405607
11 ID: 201309-20
12
13 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
14
15 Synopsis
16 ========
17
18 Multiple vulnerabilities have been found in Dropbear, the worst of
19 which could lead to arbitrary code execution.
20
21 Background
22 ==========
23
24 Dropbear is an SSH server and client designed with a small memory
25 footprint.
26
27 Affected packages
28 =================
29
30 -------------------------------------------------------------------
31 Package / Vulnerable / Unaffected
32 -------------------------------------------------------------------
33 1 net-misc/dropbear < 2012.55 >= 2012.55
34
35 Description
36 ===========
37
38 Multiple vulnerabilities have been discovered in Dropbear. Please
39 review the CVE identifier and Gentoo bug referenced below for details.
40
41 Impact
42 ======
43
44 A remote attacker could send a specially crafted request to trigger a
45 use-after-free condition, possibly resulting in arbitrary code
46 execution or a Denial of Service condition. Additionally, the bundled
47 version of libtommath has an error in its prime number generation,
48 which could result in the generation of weak keys.
49
50 Workaround
51 ==========
52
53 There is no known workaround at this time.
54
55 Resolution
56 ==========
57
58 All Dropbear users should upgrade to the latest version:
59
60 # emerge --sync
61 # emerge --ask --oneshot --verbose ">=net-misc/dropbear-2012.55"
62
63 References
64 ==========
65
66 [ 1 ] CVE-2012-0920
67 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0920
68 [ 2 ] libtommath Gentoo bug
69 https://bugs.gentoo.org/show_bug.cgi?id=328383
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-201309-20.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 https://bugs.gentoo.org.
87
88 License
89 =======
90
91 Copyright 2013 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

Attachments

File name MIME type
signature.asc application/pgp-signature