Perl 5.10.0/5.10.1 telldir null pointer dereference

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CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.8	$0-$5k	0.00

A vulnerability was found in Perl 5.10.0/5.10.1 (Programming Language Software). It has been declared as problematic. This vulnerability affects the function telldir. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. CVE summarizes:

Perl 5.10.x allows context-dependent attackers to cause a denial of service (NULL pointer dereference and application crash) by leveraging an ability to inject arguments into a (1) getpeername, (2) readdir, (3) closedir, (4) getsockname, (5) rewinddir, (6) tell, or (7) telldir function call.

The weakness was presented 05/13/2011 by Jonathan Brossard (Website). The advisory is available at securityfocus.com. This vulnerability was named CVE-2011-0761 since 02/03/2011. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known.

A public exploit has been developed in Perl. It is possible to download the exploit at securityfocus.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 71119 (GLSA-201311-17 : Perl: Multiple vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l.

Applying a patch is able to eliminate this problem. A possible mitigation has been published 3 years after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (67355), Exploit-DB (35725), Tenable (71119), SecurityFocus (BID 47766†) and SecurityTracker (ID 1025507†). See VDB-52831 for similar entry. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Programming Language Software

Name

Perl

Version

License

open-source

CPE 2.3info

CPE 2.2info

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: 🔍

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Exploitinginfo

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

Local: No
Remote: Yes

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

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Nessus ID: 71119
Nessus Name: GLSA-201311-17 : Perl: Multiple vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
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OpenVAS ID: 801790
OpenVAS Name: Perl Denial of Service Vulnerability (Windows)
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Exploit-DB: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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Timelineinfo

02/03/2011 🔍
05/03/2011 +89 days 🔍
05/10/2011 +7 days 🔍
05/13/2011 +3 days 🔍
05/13/2011 +0 days 🔍
11/28/2013 +930 days 🔍
11/29/2013 +1 days 🔍
03/23/2015 +479 days 🔍
10/12/2024 +3491 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Researcher: Jonathan Brossard
Status: Confirmed

CVE: CVE-2011-0761 (🔍)
GCVE (CVE): GCVE-0-2011-0761
GCVE (VulDB): GCVE-100-57418
X-Force: 67355
SecurityFocus: 47766 - Perl Multiple NULL Pointer Dereference Denial Of Service Vulnerabilities
SecurityTracker: 1025507

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

Entryinfo

Created: 03/23/2015 04:50 PM
Updated: 10/12/2024 10:04 PM
Changes: 03/23/2015 04:50 PM (73), 02/09/2019 11:06 AM (3), 10/12/2024 10:04 PM (17)
Complete: 🔍
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