SILC Server: Denial of Service

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200703-12 / silc-server
Release Date	March 14, 2007
Latest Revision	March 14, 2007: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-im/silc-server	< 1.0.2-r1	>= 1.0.2-r1	All supported architectures

Related bugreports: #169599

Synopsis

SILC Server is affected by a Denial of Service vulnerability.

2. Impact Information

Background

SILC Server is a server for the Secure Internet Live Conferencing (SILC) protocol.

Description

Frank Benkstein discovered a possible NULL pointer dereference in apps/silcd/command.c if a new channel is created without specifying a valid hmac or cipher algorithm name.

Impact

A remote attacker could cause the server to crash, resulting in a Denial of Service.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All SILC Server users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-im/silc-server-1.0.2-r1"

Updated March 14, 2007

Summary: This is a Gentoo Linux Security Advisory

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