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Net::Server: Format string vulnerability


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200608-18 / net-server
Release Date August 10, 2006
Latest Revision August 10, 2006: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
dev-perl/net-server < 0.88 >= 0.88 All supported architectures

Related bugreports: #142386


A format string vulnerability has been reported in Net::Server which can be exploited to cause a Denial of Service.

2.  Impact Information


Net::Server is an extensible, generic Perl server engine. It is used by several Perl applications like Postgrey.


The log function of Net::Server does not handle format string specifiers properly before they are sent to syslog.


By sending a specially crafted datastream to an application using Net::Server, an attacker could cause a Denial of Service.

3.  Resolution Information


There is no known workaround at this time.


All Net::Server should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-perl/net-server-0.88"

4.  References


Page updated August 10, 2006

Summary: This is a Gentoo Linux Security Advisory

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