CVE-2007-3799

Name	CVE-2007-3799
Description	The session_start function in ext/session in PHP 4.x up to 4.4.7 and 5.x up to 5.2.3 allows remote attackers to insert arbitrary attributes into the session cookie via special characters in a cookie that is obtained from (1) PATH_INFO, (2) the session_id function, and (3) the session_start function, which are not encoded or filtered when the new session cookie is generated, a related issue to CVE-2006-0207.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-1444-1, DSA-1578-1, DTSA-61-1
Debian Bugs	441433

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
php4	source	etch	6:4.4.4-8+etch6		DSA-1578-1
php4	source	(unstable)	(unfixed)	low
php5	source	etch	5.2.0-8+etch9		DSA-1444-1
php5	source	lenny	5.2.3-1+lenny1		DTSA-61-1
php5	source	(unstable)	5.2.4-1	low		441433

Notes

this does not affect default installs, only those who have written
custom session handlers (which isn't *that* uncommon though), and
also may not work if other cookie values are set.
fix sneaked into php 5.2.3 sans-mention:
http://cvs.php.net/viewvc.cgi/php-src/ext/session/session.c?r1=1.417.2.8.2.36&r2=1.417.2.8.2.37&pathrev=PHP_5_2
fixed in php4/etch, php5/etch, php4/sarge svn