CVE-2011-0420 EXPLOIT
5.0
MEDIUM · CVSS 2.0 · EPSS 14.4% (pctl 97)
Patch early
A public exploit exists.
Description
The grapheme_extract function in the Internationalization extension (Intl) for ICU for PHP 5.3.5 allows context-dependent attackers to cause a denial of service (crash) via an invalid size argument, which triggers a NULL pointer dereference.
Scoring
| CVSS | 5.0 (MEDIUM, v2.0) |
|---|---|
| Vector | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| EPSS | 14.41% — more likely to be exploited than 97% of all CVEs |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2011-02-19 |
| Last modified | 2026-06-16 |
Affected (1)
| Vendor | Product |
|---|---|
| php | php |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | PHP 5.3.5 - 'grapheme_extract()' Null Pointer Dereference | 2011-02-17 |
| exploit-db | PHP 5.3.5 - 'grapheme_extract()' Null Pointer Dereference Denial of Service | 2011-02-17 |
References
- http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
- http://securityreason.com/achievement_securityalert/94
- http://securityreason.com/securityalert/8087
- http://support.apple.com/kb/HT5002
- http://svn.php.net/viewvc/php/php-src/trunk/ext/intl/grapheme/grapheme_string.c?r1=306449&r2=306448&pathrev=306449
- http://www.debian.org/security/2011/dsa-2266
- http://www.exploit-db.com/exploits/16182
- http://www.kb.cert.org/vuls/id/210829
- http://www.securityfocus.com/archive/1/516504/100/0/threaded
- http://www.securityfocus.com/archive/1/516518/100/0/threaded
- http://www.securityfocus.com/bid/46429
- https://exchange.xforce.ibmcloud.com/vulnerabilities/65437
- http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
- http://securityreason.com/achievement_securityalert/94
- http://securityreason.com/securityalert/8087
- http://support.apple.com/kb/HT5002
- http://svn.php.net/viewvc/php/php-src/trunk/ext/intl/grapheme/grapheme_string.c?r1=306449&r2=306448&pathrev=306449
- http://www.debian.org/security/2011/dsa-2266
- http://www.exploit-db.com/exploits/16182
- http://www.kb.cert.org/vuls/id/210829
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