[gentoo-announce] [ GLSA 200804-27 ] SILC: Multiple vulnerabilities

[news 28]

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Gentoo Linux Security Advisory GLSA 200804-27

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http://security.gentoo.org/

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Severity: Normal

Title: SILC: Multiple vulnerabilities

Date: April 24, 2008

Bugs: #212362, #214116, #214812

ID: 200804-27

 

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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.org 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