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CUPS: Denial of Service


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200703-28 / cups
Release Date March 31, 2007
Latest Revision March 31, 2007: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
net-print/cups < 1.2.9 >= 1.2.9 All supported architectures

Related bugreports: #170881


CUPS incorrectly handles partially-negotiated SSL connections allowing for a Denial of Service.

2.  Impact Information


CUPS provides a portable printing layer for UNIX-based operating systems.


CUPS does not properly handle partially-negotiated SSL connections. Upon receiving a partially-negotiated SSL connection, CUPS no longer accepts further incoming connections, as the initial connection never times out.


An attacker could partially negotiate an SSL connection with a CUPS server, and cause future connections to that server to fail, resulting in a Denial of Service.

3.  Resolution Information


There is no known workaround at this time.


All CUPS users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-print/cups-1.2.9"

4.  References


Page updated March 31, 2007

Summary: This is a Gentoo Linux Security Advisory

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