CVE-2007-1661

Name	CVE-2007-1661
Description	Perl-Compatible Regular Expression (PCRE) library before 7.3 backtracks too far when matching certain input bytes against some regex patterns in non-UTF-8 mode, which allows context-dependent attackers to obtain sensitive information or cause a denial of service (crash), as demonstrated by the "\X?\d" and "\P{L}?\d" patterns.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
References	DSA-1399-1, DSA-1570-1, DTSA-77-1
NVD severity	medium

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
glib2.0 (PTS)	stretch	2.50.3-2+deb9u2	fixed
	buster	2.58.3-2+deb10u2	fixed
	bullseye, sid	2.66.8-1	fixed
pcre3 (PTS)	stretch	2:8.39-3	fixed
	buster	2:8.39-12	fixed
	bullseye, sid	2:8.39-13	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin
glib2.0	source	(unstable)	2.14.3-1	unimportant
kazehakase	source	etch	0.4.2-1etch1		DSA-1570-1
kazehakase	source	(unstable)	0.5.2-1
pcre3	source	sarge	4.5+7.4-1		DSA-1399-1
pcre3	source	etch	6.7+7.4-2		DSA-1399-1
pcre3	source	lenny	6.7+7.4-2+lenny1		DTSA-77-1
pcre3	source	(unstable)	7.3-1

glib only embeds pcre in the udeb, no attack vector