Perl-Compatible Regular Expression (PCRE) library before 7.3 backtracks too far when matching certain input bytes against some regex…

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.

Scores

EPSS (exploitation in 30 days)

2.5% · top 15% of all CVEs (4 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.4.

Weakness

• n/a

Affected products

• n/a

  • affected n/a

References (44)

• 30219 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 29267 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• USN-547-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• GLSA-200711-30 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
• ADV-2007-4238 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• 20071106 rPSA-2007-0231-1 pcre (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• TA07-352A (opens in a new tab)third-party-advisoryx_refsource_CERTx_transferred
• 27538 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 20071112 FLEA-2007-0064-1 pcre (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• 28136 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• DSA-1570 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• https://issues.rpath.com/browse/RPL-1738 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 27773 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 27697 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 28406 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 27554 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• ADV-2008-0924 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• pcre-nonutf8-dos(38274) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
• 27543 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• [gtk-devel-list] 20071107 GLib 2.14.3 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• 29420 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• APPLE-SA-2007-12-17 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
• GLSA-200805-11 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
• APPLE-SA-2008-03-18 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
• MDKSA-2007:211 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
• FEDORA-2008-1842 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• http://docs.info.apple.com/article.html?artnum=307179 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 27741 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• ADV-2007-3790 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• ADV-2007-3725 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• SUSE-SA:2007:062 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• http://www.pcre.org/changelog.txt (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://docs.info.apple.com/article.html?artnum=307562 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 30155 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 28720 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• GLSA-200801-02 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
• http://bugs.gentoo.org/show_bug.cgi?id=198976 (opens in a new tab)x_refsource_MISCx_transferred
• GLSA-200801-19 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
• GLSA-200801-18 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
• DSA-1399 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• 28414 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 26346 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• 30106 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 28714 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2007-1661](https://trackcve.app/badge/CVE-2007-1661.svg)](https://trackcve.app/cve/CVE-2007-1661)

Record last updated 7 Aug 2024, 13:06 UTC.