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

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.

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), Tenable (55486) and Exploit-DB (16182). The entries 54442, 56850, 56579 and 59079 are related to this item.

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CPE 2.3info

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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: 🔍
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CVSSv2info

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Exploitinginfo

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

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: 🔍
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Nessus Context: 🔍

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

Exploit-DB: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
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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 🔍
10/17/2021 +2043 days 🔍

Sourcesinfo

Product: php.org

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

CVE: CVE-2011-0420 (🔍)
OVAL: 🔍

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

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

Entryinfo

Created: 03/20/2015 16:16
Updated: 10/17/2021 14:27
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)
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