PEAR up to 1.2.1 Installer link following

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability classified as problematic has been found in PEAR up to 1.2.1. Affected is an unknown function of the component Installer. The manipulation with an unknown input leads to a link following vulnerability. CWE is classifying the issue as CWE-59. The software attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. This is going to have an impact on integrity, and availability. CVE summarizes:

The installer in PEAR 1.9.2 and earlier allows local users to overwrite arbitrary files via a symlink attack on the package.xml file, related to the (1) download_dir, (2) cache_dir, (3) tmp_dir, and (4) pear-build-download directories. NOTE: this vulnerability exists because of an incomplete fix for CVE-2011-1072.

The weakness was published 03/02/2011 (oss-sec). The advisory is shared for download at This vulnerability is traded as CVE-2011-1144 since 03/02/2011. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 55086 (Ubuntu 6.06 LTS / 8.04 LTS / 9.10 / 10.04 LTS / 10.10 / 11.04 : php5 vulnerabilities (USN-1126-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (65911), Vulnerability Center (SBV-31535) and Tenable (55086).



CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.1
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
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Class: Link following
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 55086
Nessus Name: Ubuntu 6.06 LTS / 8.04 LTS / 9.10 / 10.04 LTS / 10.10 / 11.04 : php5 vulnerabilities (USN-1126-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 840646
OpenVAS Name: Ubuntu Update for php5 USN-1126-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍


02/28/2011 🔍
03/02/2011 +2 days 🔍
03/02/2011 +0 days 🔍
03/02/2011 +0 days 🔍
04/29/2011 +58 days 🔍
05/23/2011 +24 days 🔍
03/20/2015 +1397 days 🔍
10/18/2021 +2404 days 🔍


Advisory: USN-1126-1
Status: Not defined

CVE: CVE-2011-1144 (🔍)

X-Force: 65911
Vulnerability Center: 31535 - PEAR 1.9.2 and earlier Local Arbitrary Files Overwrite Vulnerability via a Symlink Attack, Low
SecurityFocus: 47650 - PEAR Installer Multiple Insecure Temporary File Creation Vulnerabilities


Created: 03/20/2015 04:16 PM
Updated: 10/18/2021 04:49 PM
Changes: 03/20/2015 04:16 PM (54), 06/18/2017 08:19 PM (11), 10/18/2021 04:41 PM (2), 10/18/2021 04:49 PM (2)
Complete: 🔍


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