PHP 5.3.5 grapheme_extract size null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability has been found in PHP 5.3.5 and classified as problematic. This impacts the function grapheme_extract. The manipulation of the argument size leads to null pointer dereference. This vulnerability is traded as CVE-2011-0420. Furthermore, there is an exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in PHP 5.3.5 (Programming Language Software). This issue affects the function grapheme_extract. The manipulation of the argument size with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

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.

The weakness was shared 02/18/2011 by Maksymilian Arciemowicz as confirmed advisory (CERT.org). The advisory is shared at kb.cert.org. The identification of this vulnerability is CVE-2011-0420 since 01/11/2011. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 55486 (Debian DSA-2266-1 : php5 - several vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 119638 (Apple Mac OS X Lion v10.7.2 and Security Update 2011-006 Not Installed (APPLE-SA-2011-10-12-3)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 5 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (65437), Exploit-DB (16182), Tenable (55486), SecurityFocus (BID 46429†) and OSVDB (73275†). The entries VDB-54442, VDB-56850, VDB-56579 and VDB-59079 are related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

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Nessus ID: 55486
Nessus Name: Debian DSA-2266-1 : php5 - several vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 69976
OpenVAS Name: Debian Security Advisory DSA 2262-2 (php5)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Timelineinfo

01/11/2011 🔍
02/17/2011 +37 days 🔍
02/17/2011 +0 days 🔍
02/18/2011 +1 days 🔍
02/18/2011 +0 days 🔍
06/29/2011 +131 days 🔍
07/05/2011 +6 days 🔍
03/20/2015 +1354 days 🔍
03/14/2016 +360 days 🔍
01/19/2025 +3233 days 🔍

Sourcesinfo

Product: php.org

Advisory: DSA-2266
Researcher: Maksymilian Arciemowicz
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-0420 (🔍)
GCVE (CVE): GCVE-0-2011-0420
GCVE (VulDB): GCVE-100-56549

OVAL: 🔍

CERT: 🔍
X-Force: 65437
SecurityFocus: 46429 - PHP 'grapheme_extract()' NULL Pointer Dereference Denial Of Service Vulnerability
OSVDB: 73275
Vulnerability Center: 57271 - PHP 5.3.5 Remote DoS Vulnerability via an Invalid Size Argument, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/20/2015 16:16
Updated: 01/19/2025 05:41
Changes: 03/20/2015 16:16 (65), 02/01/2019 09:29 (18), 10/17/2021 14:22 (3), 10/17/2021 14:24 (1), 10/17/2021 14:27 (1), 08/23/2024 02:25 (14), 12/29/2024 23:39 (1), 01/19/2025 05:41 (2)
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Cache ID: 216:B3F:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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