INFORMATION BULLETIN
INFORMATION BULLETIN
| PROBLEM: | Multiple vulnerabilities were found in SILC Client, Server, and Toolkit, allowing for Denial of Service and remote execution of arbitrary code. |
| PLATFORM: | SILC Toolkit 1.1.7 SILC Client 1.1.4 SILC Server 1.1.2 |
| DAMAGE: | Execute arbitrary code. |
| SOLUTION: | Upgrade to the appropriate version. |
| VULNERABILITY ASSESSMENT: |
The risk is MEDIUM. A remote attacker could exploit these vulnerabilities to cause a Denial of Service or execute arbitrary code with the privileges of the user running the application. |
| CVSS 2 BASE SCORE: TEMPORAL SCORE: VECTOR: |
7.5 6.2 (AV:N/AC:L/Au:N/C:P/I:P/A:P/E:F/RL:OF/RC:C) |
| LINKS: | |
| CIAC BULLETIN: | http://www.ciac.org/ciac/bulletins/s-281.shtml |
| ORIGINAL BULLETIN: | http://www.securityfocus.com/archive/1/491279/30/0/threaded |
| CVE: | CVE-2008-1227 CVE-2008-1429 CVE-2008-1552 |
[***** Start Gentoo Linux Security Advisory GLSA 200804-27 *****] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 200804-27
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal
Title: SILC: Multiple vulnerabilities
Date: April 24, 2008
Bugs: #212362, #214116, #214812
ID: 200804-27
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis
========
Multiple vulnerabilities were found in SILC Client, Server, and
Toolkit, allowing for Denial of Service and execution of arbitrary
code.
Background
==========
SILC (Secure Internet Live Conferencing protocol) Toolkit is a software
development kit for use in clients, SILC Server is a communication
server, and SILC Client is an IRSSI-based text client.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-im/silc-toolkit < 1.1.7 >= 1.1.7
2 net-im/silc-client < 1.1.4 >= 1.1.4
3 net-im/silc-server < 1.1.2 >= 1.1.2
-------------------------------------------------------------------
3 affected packages on all of their supported architectures.
-------------------------------------------------------------------
Description
===========
* Nathan G. Grennan reported a boundary error in SILC Toolkit within
the silc_fingerprint() function in the file lib/silcutil/silcutil.c
when passing overly long data, resulting in a stack-based buffer
overflow (CVE-2008-1227).
* A vulnerability has been reported in SILC Server which is caused
due to an error in the handling of "NEW_CLIENT" packets that do not
contain a nickname (CVE-2008-1429).
* Ariel Waissbein, Pedro Varangot, Martin Mizrahi, Oren Isacson,
Carlos Garcia, and Ivan Arce of Core Security Technologies reported
that SILC Client, Server, and Toolkit contain a vulnerability in the
silc_pkcs1_decode() function in the silccrypt library (silcpkcs1.c),
resulting in an integer underflow, signedness error, and a buffer
overflow (CVE-2008-1552).
Impact
======
A remote attacker could exploit these vulnerabilities to cause a Denial
of Service or execute arbitrary code with the privileges of the user
running the application.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All SILC Toolkit users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-im/silc-toolkit-1.1.7"
All SILC Client users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-im/silc-client-1.1.4"
All SILC Server users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-im/silc-server-1.1.2"
References
==========
[ 1 ] CVE-2008-1227
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1227
[ 2 ] CVE-2008-1429
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1429
[ 3 ] CVE-2008-1552
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1552
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200804-27.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security (at) gentoo (dot) org [email concealed] or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2008 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
[***** End Gentoo Linux Security Advisory GLSA 200804-27 *****]
Voice: +1 925-422-8193 (7 x 24)
FAX: +1 925-423-8002
STU-III: +1 925-423-2604
E-mail: ciac@ciac.org
World Wide Web: http://www.ciac.org/
Anonymous FTP: ftp.ciac.org