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Fencer Intel
medium 5.0

CVE-2011-0420 json

The grapheme_extract function in the Internationalization extension (Intl) for ICU for PHP 5.3.5 allows context-dependent attackers to caus…

published 2011-02-18 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-0446

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
14.4%
EPSS 14.4% chance of exploitation in 30 days, percentile 96%
public exploits
2
Exploit-DB

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.

Patch / fix

  • php7 openSUSE Tumbleweed 7.0.14-1.4
  • php5 openSUSE Tumbleweed 5.6.28-1.1
  • php8 openSUSE Tumbleweed 8.0.11-1.1

opensuse advisories openSUSE-SU-2024:10290-1openSUSE-SU-2024:10344-1openSUSE-SU-2024:11169-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-0420 updated cvss 2.6

php: missing $size checks in grapheme_extract()

  • Red Hat Enterprise Linux 4 php Red Hat Enterprise Linux 5 php, php53 Red Hat Enterprise Linux 6 php, php-gd, php-cli, php-dba, php-fpm, php-pdo, +20 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-35354)
  2. Published

Exploit prediction

14.41% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-35354 PHP 5.3.5 - 'grapheme_extract()' Null Pointer Dereference Denial of Service dos, 2011-02-17
  • EDB-16182 PHP 5.3.5 - 'grapheme_extract()' Null Pointer Dereference dos, 2011-02-17
  • securityfocus.com http://www.securityfocus.com/bid/46429 referenced PoC, tagged "exploit" by a source, unverified
  • securityreason.com http://securityreason.com/achievement_securityalert/94 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Technology feeds

References

Sources

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