CVE-2010-3870

Name: CVE-2010-3870
Creator: NVD / NIST
Published: 2010-11-12T21:00:02.937+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 11.28%

Last modified Jun 16, 2026

CVE-2010-3870 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 11.28% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

11.28%

95.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Php	Php	< 5.2.14
Php	Php	>= 5.3.0, < 5.3.4
Canonical	Ubuntu Linux	6.06
Canonical	Ubuntu Linux	8.04
Canonical	Ubuntu Linux	9.10
Canonical	Ubuntu Linux	10.04
Canonical	Ubuntu Linux	10.10

References

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

Timeline

Published: Nov 12, 2010
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2010-3870?

How severe is CVE-2010-3870?

Severity scoring for CVE-2010-3870 is pending analysis. The EPSS model estimates a 11.28% probability of exploitation in the next 30 days.

How do I fix CVE-2010-3870?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2010-3870?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST