CVE-2007-1661

    Dashboard / Vulnerabilities / CVE-2007-1661

    CVE-2007-1661

    Published: 7 Nov 2007Last Modified: 10 Apr 2026

    Summary:

    Details: 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.

    References: http://secunia.com/advisories/27538, http://secunia.com/advisories/27543, http://secunia.com/advisories/27554, http://secunia.com/advisories/27697, http://secunia.com/advisories/27741, http://secunia.com/advisories/27773, http://secunia.com/advisories/28136, http://secunia.com/advisories/28406, http://secunia.com/advisories/28414, http://secunia.com/advisories/28714, http://secunia.com/advisories/28720, http://secunia.com/advisories/29267, http://secunia.com/advisories/29420, http://secunia.com/advisories/30106, http://secunia.com/advisories/30155, http://secunia.com/advisories/30219, http://security.gentoo.org/glsa/glsa-200711-30.xml, http://security.gentoo.org/glsa/glsa-200801-02.xml, http://security.gentoo.org/glsa/glsa-200801-18.xml, http://security.gentoo.org/glsa/glsa-200801-19.xml, http://security.gentoo.org/glsa/glsa-200805-11.xml, http://www.debian.org/security/2008/dsa-1570, http://www.mandriva.com/security/advisories?name=MDKSA-2007:211, http://www.novell.com/linux/security/advisories/2007_62_pcre.html, http://www.vupen.com/english/advisories/2007/3725, http://www.vupen.com/english/advisories/2007/3790, http://www.vupen.com/english/advisories/2007/4238, http://www.vupen.com/english/advisories/2008/0924/references, http://www.debian.org/security/2007/dsa-1399, http://bugs.gentoo.org/show_bug.cgi?id=198976, http://docs.info.apple.com/article.html?artnum=307179, http://docs.info.apple.com/article.html?artnum=307562, http://lists.apple.com/archives/security-announce/2007/Dec/msg00002.html, http://lists.apple.com/archives/security-announce/2008/Mar/msg00001.html, http://mail.gnome.org/archives/gtk-devel-list/2007-November/msg00022.html, http://www.pcre.org/changelog.txt, http://www.securityfocus.com/archive/1/483357/100/0/threaded, http://www.securityfocus.com/archive/1/483579/100/0/threaded, http://www.securityfocus.com/bid/26346, http://www.us-cert.gov/cas/techalerts/TA07-352A.html, https://exchange.xforce.ibmcloud.com/vulnerabilities/38274, https://issues.rpath.com/browse/RPL-1738, https://usn.ubuntu.com/547-1/, https://www.redhat.com/archives/fedora-package-announce/2008-March/msg00181.html

    Affected packages

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High