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CVE-2011-0420

MediumPublished

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...

Published: Feb 18, 2011
Updated: Aug 6, 2024
Assigning CNA: certcc
Evidence observed: Feb 17, 2011

Primary CVSS

5.0/ 10Medium

nvd · CVSS 2.0

AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS probability estimate

14.4%

Moderate · next 30 days

Percentile: 96.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

PHP 5.3.5 - 'grapheme_extract()' Null Pointer DereferenceExploit
Maksymilian Arciemowicz · linux · Feb 17, 2011
PHP 5.3.5 - 'grapheme_extract()' Null Pointer Dereference Denial of ServiceExploit
Maksymilian Arciemowicz · php · Feb 17, 2011

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