Heap-based buffer overflow in ext/mbstring/libmbfl/filters/mbfilter_htmlent.c in the mbstring extension in PHP 4.3.0 through 5.2.6 allows…

Description

Heap-based buffer overflow in ext/mbstring/libmbfl/filters/mbfilter_htmlent.c in the mbstring extension in PHP 4.3.0 through 5.2.6 allows context-dependent attackers to execute arbitrary code via a crafted string containing an HTML entity, which is not properly handled during Unicode conversion, related to the (1) mb_convert_encoding, (2) mb_check_encoding, (3) mb_convert_variables, and (4) mb_parse_str functions.

Scores

EPSS (exploitation in 30 days)

7.4% · top 5.6% of all CVEs (4 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 10.0.

Weakness

• n/a
• CWE-119 (opens in a new tab)All about CWE-119 and its CVEs

Affected products

• n/a

  • affected n/a

References (29)

• HPSBUX02465 (opens in a new tab)vendor-advisoryx_refsource_HPx_transferred
• http://support.apple.com/kb/HT3549 (opens in a new tab)x_refsource_CONFIRMx_transferred
• SSRT090085 (opens in a new tab)vendor-advisoryx_refsource_HPx_transferred
• http://cvs.php.net/viewvc.cgi/php-src/ext/mbstring/libmbfl/filters/mbfilter_htmlent.c?r1=1.7&r2=1.8 (opens in a new tab)x_refsource_CONFIRMx_transferred
• FEDORA-2009-3768 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• 20090302 rPSA-2009-0035-1 php php-cgi php-imap php-mcrypt php-mysql php-mysqli php-pgsql php-soap php-xsl php5 php5-cgi php5-imap php5-mcrypt php5-mysql php5-mysqli php5-pear php5-pgsql php5-soap php5-xsl (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• 20081221 CVE-2008-5557 - PHP mbstring buffer overflow (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
• http://wiki.rpath.com/Advisories:rPSA-2009-0035 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 34642 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 1021482 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• 35074 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• HPSBMA02492 (opens in a new tab)vendor-advisoryx_refsource_HPx_transferred
• APPLE-SA-2009-05-12 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
• SUSE-SR:2009:004 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• SUSE-SR:2009:008 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• RHSA-2009:0350 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• FEDORA-2009-3848 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• 35003 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• http://www.php.net/ChangeLog-5.php#5.2.7 (opens in a new tab)x_refsource_CONFIRMx_transferred
• TA09-133A (opens in a new tab)third-party-advisoryx_refsource_CERTx_transferred
• php-multibyte-bo(47525) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
• MDVSA-2009:045 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
• ADV-2009-1297 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• http://bugs.php.net/bug.php?id=45722 (opens in a new tab)x_refsource_CONFIRMx_transferred
• oval:org.mitre.oval:def:10286 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• 35306 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 35650 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 32948 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• DSA-1789 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_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-2008-5557](https://trackcve.app/badge/CVE-2008-5557.svg)](https://trackcve.app/cve/CVE-2008-5557)

Record last updated 7 Aug 2024, 10:56 UTC.