Gentoo Archives: gentoo-announce

From: Stefan Cornelius <dercorny@g.o>
To: gentoo-announce@l.g.o
Cc: bugtraq@×××××××××××××.com, full-disclosure@××××××××××××××.uk, security-alerts@×××××××××××××.com
Subject: [gentoo-announce] [ GLSA 200512-13 ] Dropbear: Privilege escalation
Date: Fri, 23 Dec 2005 11:58:08
Message-Id: 200512231235.16584.dercorny@gentoo.org
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2 Gentoo Linux Security Advisory GLSA 200512-13
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4 http://security.gentoo.org/
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6
7 Severity: High
8 Title: Dropbear: Privilege escalation
9 Date: December 23, 2005
10 Bugs: #116006
11 ID: 200512-13
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14
15 Synopsis
16 ========
17
18 A buffer overflow in Dropbear could allow authenticated users to
19 execute arbitrary code as the root user.
20
21 Background
22 ==========
23
24 Dropbear is an SSH server and client with a small memory footprint.
25
26 Affected packages
27 =================
28
29 -------------------------------------------------------------------
30 Package / Vulnerable / Unaffected
31 -------------------------------------------------------------------
32 1 net-misc/dropbear < 0.47 >= 0.47
33
34 Description
35 ===========
36
37 Under certain conditions Dropbear could fail to allocate a sufficient
38 amount of memory, possibly resulting in a buffer overflow.
39
40 Impact
41 ======
42
43 By sending specially crafted data to the server, authenticated users
44 could exploit this vulnerability to execute arbitrary code with the
45 permissions of the SSH server user, which is the root user by default.
46
47 Workaround
48 ==========
49
50 There is no known workaround at this time.
51
52 Resolution
53 ==========
54
55 All Dropbear users should upgrade to the latest version:
56
57 # emerge --sync
58 # emerge --ask --oneshot --verbose ">=net-misc/dropbear-0.47"
59
60 References
61 ==========
62
63 [ 1 ] CVE-2005-4178
64 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-4178
65
66 Availability
67 ============
68
69 This GLSA and any updates to it are available for viewing at
70 the Gentoo Security Website:
71
72 http://security.gentoo.org/glsa/glsa-200512-13.xml
73
74 Concerns?
75 =========
76
77 Security is a primary focus of Gentoo Linux and ensuring the
78 confidentiality and security of our users machines is of utmost
79 importance to us. Any security concerns should be addressed to
80 security@g.o or alternatively, you may file a bug at
81 http://bugs.gentoo.org.
82
83 License
84 =======
85
86 Copyright 2005 Gentoo Foundation, Inc; referenced text
87 belongs to its owner(s).
88
89 The contents of this document are licensed under the
90 Creative Commons - Attribution / Share Alike license.
91
92 http://creativecommons.org/licenses/by-sa/2.0