php: missing $size checks in grapheme_extract()
Published Feb 18, 2011
5.0
MEDIUMCVSS 2.0
EPSS 14.41%
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.
Affected products
No data.
No data.
Red Hat Enterprise Linux 4
php
Not affected
Red Hat Enterprise Linux 5
php
Not affected
Red Hat Enterprise Linux 5
php53
Not affected
Red Hat Enterprise Linux 6
php
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | php | Not affected | n/a |
| Red Hat Enterprise Linux 5 | php | Not affected | n/a |
| Red Hat Enterprise Linux 5 | php53 | Not affected | n/a |
| Red Hat Enterprise Linux 6 | php | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat does not consider this flaw to be a security issue. The size argument of the grapheme_extract function is unlikely to from an untrusted source unfiltered, therefore the value passed to the function is under the the full control of the script author and no trust boundary is crossed.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 14.41% (0.14409) | 96.52th | v5 (v2026.06.15) |
| Jun 15, 2026 | 14.41% (0.14409) | 96.16th | v5 (v2026.06.15) |
| Dec 28, 2025 | 15.15% (0.15149) | 94.37th | v4 (v2025.03.14) |
| Dec 27, 2025 | 16.46% (0.16459) | 94.70th | v4 (v2025.03.14) |
| Oct 28, 2025 | 15.15% (0.15149) | 94.28th | v4 (v2025.03.14) |
| Oct 27, 2025 | 16.46% (0.16459) | 94.62th | v4 (v2025.03.14) |
| Oct 1, 2025 | 15.15% (0.15149) | 94.38th | v4 (v2025.03.14) |
| Aug 20, 2025 | 16.46% (0.16459) | 94.61th | v4 (v2025.03.14) |
| Jul 30, 2025 | 14.50% (0.14498) | 94.16th | v4 (v2025.03.14) |
| May 7, 2025 | 13.31% (0.13313) | 93.74th | v4 (v2025.03.14) |
| Mar 17, 2025 | 6.37% (0.06371) | 90.31th | v4 (v2025.03.14) |
| Dec 12, 2024 | 2.15% (0.02146) | 89.70th | v3 (v2023.03.01) |
| Mar 9, 2023 | 2.15% (0.02146) | 87.49th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.11% (0.02114) | 87.39th | v3 (v2023.03.01) |
| Mar 6, 2023 | 12.57% (0.12567) | 95.52th | v2 (v2022.01.01) |
| Apr 1, 2022 | 12.57% (0.12567) | 95.18th | v2 (v2022.01.01) |
| Feb 4, 2022 | 12.57% (0.12567) | 90.03th | v2 (v2022.01.01) |
No CWE recorded.
References (16)
- http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html vendor-advisoryx_refsource_APPLE
- http://securityreason.com/achievement_securityalert/94 third-party-advisoryx_refsource_SREASONRESExploit
- http://securityreason.com/securityalert/8087 third-party-advisoryx_refsource_SREASON
- http://support.apple.com/kb/HT5002 x_refsource_CONFIRM
- http://svn.php.net/viewvc/php/php-src/trunk/ext/intl/grapheme/grapheme_string.c?r1=306449&r2=306448&pathrev=306449 x_refsource_MISCPatch
- http://www.debian.org/security/2011/dsa-2266 vendor-advisoryx_refsource_DEBIAN
- http://www.exploit-db.com/exploits/16182 exploitx_refsource_EXPLOIT-DB
- http://www.kb.cert.org/vuls/id/210829 third-party-advisoryx_refsource_CERT-VNUS Government Resource
- http://www.securityfocus.com/archive/1/516504/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/archive/1/516518/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/bid/46429 vdb-entryx_refsource_BIDExploit
- https://access.redhat.com/security/cve/CVE-2011-0420 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=678885 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/65437 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2011-0420
- https://www.cve.org/CVERecord?id=CVE-2011-0420
Change history (0)
No recorded changes yet.