Gentoo Archives: gentoo-announce

From: Thomas Deutschmann <whissi@g.o>
To: gentoo-announce@l.g.o
Subject: [gentoo-announce] [ GLSA 201703-03 ] PuTTY: Buffer overflow
Date: Sun, 19 Mar 2017 18:52:35
Message-Id: 025be724-6b76-4cc0-c528-1736394c07a4@gentoo.org
1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
2 Gentoo Linux Security Advisory GLSA 201703-03
3 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
4 https://security.gentoo.org/
5 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
6
7 Severity: Normal
8 Title: PuTTY: Buffer overflow
9 Date: March 19, 2017
10 Bugs: #610552
11 ID: 201703-03
12
13 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
14
15 Synopsis
16 ========
17
18 A buffer overflow in PuTTY might allow remote attackers to execute
19 arbitrary code or cause a denial of service.
20
21 Background
22 ==========
23
24 PuTTY is a free implementation of Telnet and SSH for Windows and Unix
25 platforms, along with an xterm terminal emulator.
26
27 Affected packages
28 =================
29
30 -------------------------------------------------------------------
31 Package / Vulnerable / Unaffected
32 -------------------------------------------------------------------
33 1 net-misc/putty < 0.68 >= 0.68
34
35 Description
36 ===========
37
38 A heap-corrupting buffer overflow bug in the ssh_agent_channel_data
39 function of PuTTY was found.
40
41 Impact
42 ======
43
44 A remote attacker, utilizing the SSH agent forwarding of an SSH server,
45 could execute arbitrary code with the privileges of the user running
46 the client or cause a Denial of Service condition.
47
48 Workaround
49 ==========
50
51 There is no known workaround at this time.
52
53 Resolution
54 ==========
55
56 All PuTTY users should upgrade to the latest version:
57
58 # emerge --sync
59 # emerge --ask --oneshot --verbose ">=net-misc/putty-0.68"
60
61 References
62 ==========
63
64 [ 1 ] CVE-2017-6542
65 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-6542
66
67 Availability
68 ============
69
70 This GLSA and any updates to it are available for viewing at
71 the Gentoo Security Website:
72
73 https://security.gentoo.org/glsa/201703-03
74
75 Concerns?
76 =========
77
78 Security is a primary focus of Gentoo Linux and ensuring the
79 confidentiality and security of our users' machines is of utmost
80 importance to us. Any security concerns should be addressed to
81 security@g.o or alternatively, you may file a bug at
82 https://bugs.gentoo.org.
83
84 License
85 =======
86
87 Copyright 2017 Gentoo Foundation, Inc; referenced text
88 belongs to its owner(s).
89
90 The contents of this document are licensed under the
91 Creative Commons - Attribution / Share Alike license.
92
93 http://creativecommons.org/licenses/by-sa/2.5

Attachments

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