Net::Server: Format string vulnerability

1. Gentoo Linux Security Advisory

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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