CVE-2010-3870

The utf8_decode function in PHP before 5.3.4 does not properly handle non-shortest form UTF-8 encoding and ill-formed subsequences in UTF-8 data, which makes it easier for remote attackers to bypass cross-site scripting (XSS) and SQL injection protection mechanisms via a crafted string.

• CWE-20

• http://bugs.php.net/bug.php?id=48230Exploit, Vendor Advisory
• http://bugs.php.net/bug.php?id=49687Exploit, Vendor Advisory
• http://lists.apple.com/archives/security-announce/2011/Mar/msg00006.htmlMailing List, Third Party Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052836.htmlMailing List, Third Party Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052845.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00000.htmlMailing List, Third Party Advisory
• http://marc.info/?l=bugtraq&m=133469208622507&w=2Mailing List, Third Party Advisory
• http://secunia.com/advisories/42410Third Party Advisory
• http://secunia.com/advisories/42812Third Party Advisory
• http://sirdarckcat.blogspot.com/2009/10/couple-of-unicode-issues-on-php-and.htmlExploit, Third Party Advisory
• http://support.apple.com/kb/HT4581Third Party Advisory
• http://svn.php.net/viewvc?view=revision&revision=304959Patch, Vendor Advisory
• http://us2.php.net/manual/en/function.utf8-decode.php#83935Exploit, Vendor Advisory
• http://www.acunetix.com/blog/web-security-articles/security-risks-associated-with-utf8_decode/Exploit, Third Party Advisory
• http://www.blackhat.com/presentations/bh-usa-09/VELANAVA/BHUSA09-VelaNava-FavoriteXSS-SLIDES.pdfExploit, Third Party Advisory
• http://www.mandriva.com/en/security/advisories?name=MDVSA-2010:224Third Party Advisory
• http://www.openwall.com/lists/oss-security/2010/11/02/1Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2010/11/02/11Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2010/11/02/2Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2010/11/02/4Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2010/11/02/6Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2010/11/02/8Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2010/11/03/1Mailing List, Third Party Advisory
• http://www.php.net/ChangeLog-5.phpVendor Advisory
• http://www.redhat.com/support/errata/RHSA-2010-0919.htmlThird Party Advisory
• http://www.redhat.com/support/errata/RHSA-2011-0195.htmlThird Party Advisory
• http://www.securityfocus.com/bid/44605Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id?1024797Third Party Advisory, VDB Entry
• http://www.ubuntu.com/usn/USN-1042-1Third Party Advisory
• http://www.vupen.com/english/advisories/2010/3081Third Party Advisory
• http://www.vupen.com/english/advisories/2011/0020Third Party Advisory
• http://www.vupen.com/english/advisories/2011/0021Third Party Advisory
• http://www.vupen.com/english/advisories/2011/0077Third Party Advisory
• http://bugs.php.net/bug.php?id=48230Exploit, Vendor Advisory
• http://bugs.php.net/bug.php?id=49687Exploit, Vendor Advisory
• http://lists.apple.com/archives/security-announce/2011/Mar/msg00006.htmlMailing List, Third Party Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052836.htmlMailing List, Third Party Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052845.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00000.htmlMailing List, Third Party Advisory
• http://marc.info/?l=bugtraq&m=133469208622507&w=2Mailing List, Third Party Advisory
• http://secunia.com/advisories/42410Third Party Advisory
• http://secunia.com/advisories/42812Third Party Advisory
• http://sirdarckcat.blogspot.com/2009/10/couple-of-unicode-issues-on-php-and.htmlExploit, Third Party Advisory
• http://support.apple.com/kb/HT4581Third Party Advisory
• http://svn.php.net/viewvc?view=revision&revision=304959Patch, Vendor Advisory
• http://us2.php.net/manual/en/function.utf8-decode.php#83935Exploit, Vendor Advisory
• http://www.acunetix.com/blog/web-security-articles/security-risks-associated-with-utf8_decode/Exploit, Third Party Advisory
• http://www.blackhat.com/presentations/bh-usa-09/VELANAVA/BHUSA09-VelaNava-FavoriteXSS-SLIDES.pdfExploit, Third Party Advisory
• http://www.mandriva.com/en/security/advisories?name=MDVSA-2010:224Third Party Advisory
• http://www.openwall.com/lists/oss-security/2010/11/02/1Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2010/11/02/11Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2010/11/02/2Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2010/11/02/4Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2010/11/02/6Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2010/11/02/8Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2010/11/03/1Mailing List, Third Party Advisory
• http://www.php.net/ChangeLog-5.phpVendor Advisory
• http://www.redhat.com/support/errata/RHSA-2010-0919.htmlThird Party Advisory
• http://www.redhat.com/support/errata/RHSA-2011-0195.htmlThird Party Advisory
• http://www.securityfocus.com/bid/44605Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id?1024797Third Party Advisory, VDB Entry
• http://www.ubuntu.com/usn/USN-1042-1Third Party Advisory
• http://www.vupen.com/english/advisories/2010/3081Third Party Advisory
• http://www.vupen.com/english/advisories/2011/0020Third Party Advisory
• http://www.vupen.com/english/advisories/2011/0021Third Party Advisory
• http://www.vupen.com/english/advisories/2011/0077Third Party Advisory

Published

Nov 12, 2010

Last Modified

Jun 16, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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