Debian: 380-2 Critical: LibXML2 Buffer Overflow Vulnerability

Alexander Hvostov, Julien Blache and Aurelien Jarno discovered several
security-related problems in the sane-backends package, which contains
an API library for scanners including a scanning daemon (in the
package libsane) that can be remotely exploited. Thes problems allow
a remote attacker to cause a segfault fault and/or consume arbitrary
amounts of memory. The attack is successful, even if the attacker's
computer isn't listed in saned.conf.

You are only vulnerable if you actually run saned e.g. in xinetd or
inetd. If the entries in the configuration file of xinetd or inetd
respectively are commented out or do not exist, you are safe.

Try "telnet localhost 6566" on the server that may run saned. If you
get "connection refused" saned is not running and you are safe.

The Common Vulnerabilities and Exposures project identifies the
following problems:

CAN-2003-0773:

saned checks the identity (IP address) of the remote host only
after the first communication took place (SANE_NET_INIT). So
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