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    CVE-2007-1661

    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.

    Published:Nov 5, 2007
    Last Modified:Apr 23, 2026
    EPS:Nov 7, 2007
    EPSS Score:0.02034
    CVSS Score:6.4

    Affected Products

    Vendor
    Apple
    Product
    Mac Os X
    Vendor
    Apple
    Product
    Mac Os X Server
    Vendor
    Pcre
    Product
    Perl-compatible Regular Expression Library

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    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://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/2007/dsa-1399
    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.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
    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
    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
    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://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/2007/dsa-1399
    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.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
    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
    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

    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