| 1 |
-----BEGIN PGP SIGNED MESSAGE----- |
| 2 |
Hash: SHA1 |
| 3 |
|
| 4 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 5 |
Gentoo Linux Security Advisory GLSA 200408-04 |
| 6 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 7 |
http://security.gentoo.org/ |
| 8 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 9 |
|
| 10 |
Severity: Normal |
| 11 |
Title: PuTTY: Pre-authentication arbitrary code execution |
| 12 |
Date: August 05, 2004 |
| 13 |
Bugs: #59383 |
| 14 |
ID: 200408-04 |
| 15 |
|
| 16 |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 17 |
|
| 18 |
Synopsis |
| 19 |
======== |
| 20 |
|
| 21 |
PuTTY contains a vulnerability allowing a SSH server to execute |
| 22 |
arbitrary code on the connecting client. |
| 23 |
|
| 24 |
Background |
| 25 |
========== |
| 26 |
|
| 27 |
PuTTY is a free implementation of Telnet and SSH for Win32 and Unix |
| 28 |
platforms, along with an xterm terminal emulator. |
| 29 |
|
| 30 |
Affected packages |
| 31 |
================= |
| 32 |
|
| 33 |
------------------------------------------------------------------- |
| 34 |
Package / Vulnerable / Unaffected |
| 35 |
------------------------------------------------------------------- |
| 36 |
1 net-misc/putty <= 0.54 >= 0.55 |
| 37 |
|
| 38 |
Description |
| 39 |
=========== |
| 40 |
|
| 41 |
PuTTY contains a vulnerability allowing a malicious server to execute |
| 42 |
arbitrary code on the connecting client before host key verification. |
| 43 |
|
| 44 |
Impact |
| 45 |
====== |
| 46 |
|
| 47 |
When connecting to a server using the SSH2 protocol an attacker is able |
| 48 |
to execute arbitrary code with the permissions of the user running |
| 49 |
PuTTY by sending specially crafted packets to the client during the |
| 50 |
authentication process but before host key verification. |
| 51 |
|
| 52 |
Workaround |
| 53 |
========== |
| 54 |
|
| 55 |
There is no known workaround at this time. All users are encouraged to |
| 56 |
upgrade to the latest available version of PuTTY. |
| 57 |
|
| 58 |
Resolution |
| 59 |
========== |
| 60 |
|
| 61 |
All PuTTY users should upgrade to the latest version: |
| 62 |
|
| 63 |
# emerge sync |
| 64 |
|
| 65 |
# emerge -pv ">=net-misc/putty-0.55" |
| 66 |
# emerge ">=net-misc/putty-0.55" |
| 67 |
|
| 68 |
References |
| 69 |
========== |
| 70 |
|
| 71 |
[ 1 ] PuTTY ChangeLog |
| 72 |
http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html |
| 73 |
|
| 74 |
Availability |
| 75 |
============ |
| 76 |
|
| 77 |
This GLSA and any updates to it are available for viewing at |
| 78 |
the Gentoo Security Website: |
| 79 |
|
| 80 |
http://security.gentoo.org/glsa/glsa-200408-04.xml |
| 81 |
|
| 82 |
Concerns? |
| 83 |
========= |
| 84 |
|
| 85 |
Security is a primary focus of Gentoo Linux and ensuring the |
| 86 |
confidentiality and security of our users machines is of utmost |
| 87 |
importance to us. Any security concerns should be addressed to |
| 88 |
security@g.o or alternatively, you may file a bug at |
| 89 |
http://bugs.gentoo.org. |
| 90 |
|
| 91 |
License |
| 92 |
======= |
| 93 |
|
| 94 |
Copyright 2004 Gentoo Foundation, Inc; referenced text |
| 95 |
belongs to its owner(s). |
| 96 |
|
| 97 |
The contents of this document are licensed under the |
| 98 |
Creative Commons - Attribution / Share Alike license. |
| 99 |
|
| 100 |
http://creativecommons.org/licenses/by-sa/1.0 |
| 101 |
-----BEGIN PGP SIGNATURE----- |
| 102 |
Version: GnuPG v1.2.4 (GNU/Linux) |
| 103 |
|
| 104 |
iD8DBQFBEiNpzKC5hMHO6rkRAqqfAKCAlxPnzBfJ396cnyBBeWsMi+sQKwCfRlP2 |
| 105 |
MVDuAX5vjBz5sMu1sCBvI6A= |
| 106 |
=sog4 |
| 107 |
-----END PGP SIGNATURE----- |
Archives