The PHP Extension and Application Repository (PEAR) Installer.php file overwrite

pear-installer-file-overwrite (34482) The risk level is classified as MediumMedium Risk

Description:

PEAR could allow a remote attacker to overwrite arbitrary files on the system, caused by improper validation by the Installer.php function. By persuading a victim to install a malicious PEAR package, a remote attacker could exploit this vulnerability to overwrite arbitrary files and possibly execute arbitrary code on the system.

*CVSS:

Base Score: 4.2
  Access Vector: Remote
  Access Complexity: High
  Authentication: Not Required
  Confidentiality Impact: None
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 3.1
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

File Manipulation

Remedy:

Refer to PEAR SECURITY VULNERABILITY ANNOUNCEMENT 2007/05/07 for patch, upgrade, or suggested workaround information. See References.

For Ubuntu Linux (PEAR):
Refer to USN-462-1 for patch, upgrade, or suggested workaround information. See References.

For Mandriva Linux (php-pear):
Refer to MDKSA-2007:110 for patch, upgrade, or suggested workaround information. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

References:

  • PEAR SECURITY VULNERABILITY ANNOUNCEMENT 2007/05/07: PEAR installer arbitrary code execution vulnerability.
  • PEAR Web site: PEAR :: Package :: Auth.
  • BID-24111: PHP PEAR INSTALL-AS Attribute Arbitrary File Overwrite Vulnerability
  • CVE-2007-2519: Directory traversal vulnerability in the installer in PEAR 1.0 through 1.5.3 allows user-assisted remote attackers to overwrite arbitrary files via a .. (dot dot) sequence in the (1) install-as attribute in the file element in package.xml 1.0 or the (2) as attribute in the install element in package.xml 2.0. NOTE: it could be argued that this does not cross privilege boundaries in typical installations, since the code being installed could perform the same actions.
  • MDKSA-2007:110: Updated php-pear packages fix directory traversal vulnerability
  • OSVDB ID: 42108: PEAR package.xml Installer Multiple Attribute Traversal Arbitrary File Overwrite
  • OSVDB ID: 75083: PEAR Installer Multiple Directory Temporary File Symlink Arbitrary File Overwrite
  • USN-462-1: PHP vulnerabilities

Platforms Affected:

  • Canonical Ubuntu 6.06 LTS
  • Canonical Ubuntu 6.10
  • Canonical Ubuntu 7.04
  • MandrakeSoft Mandrake Linux 2007
  • MandrakeSoft Mandrake Linux 2007 X86_64
  • MandrakeSoft Mandrake Linux 2007.1
  • MandrakeSoft Mandrake Linux 2007.1 X86_64
  • MandrakeSoft Mandrake Linux 2008.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 3.0
  • MandrakeSoft Mandrake Linux Corporate Server 4.0
  • MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
  • PHP PEAR 1.0
  • PHP PEAR 1.0.1
  • PHP PEAR 1.1
  • PHP PEAR 1.2
  • PHP PEAR 1.2.1
  • PHP PEAR 1.2b1
  • PHP PEAR 1.2b2
  • PHP PEAR 1.2b3
  • PHP PEAR 1.2b4
  • PHP PEAR 1.2b5
  • PHP PEAR 1.3
  • PHP PEAR 1.3.1
  • PHP PEAR 1.3.3
  • PHP PEAR 1.3.3.1
  • PHP PEAR 1.3.4
  • PHP PEAR 1.3.5
  • PHP PEAR 1.3.6
  • PHP PEAR 1.3b1
  • PHP PEAR 1.3b2
  • PHP PEAR 1.3b3
  • PHP PEAR 1.3b5
  • PHP PEAR 1.3b6
  • PHP PEAR 1.4.0
  • PHP PEAR 1.4.0 RC1
  • PHP PEAR 1.4.0 RC2
  • PHP PEAR 1.4.0 b2
  • PHP PEAR 1.4.0 b1
  • PHP PEAR 1.4.0a1
  • PHP PEAR 1.4.0a10
  • PHP PEAR 1.4.0a11
  • PHP PEAR 1.4.0a12
  • PHP PEAR 1.4.0a2
  • PHP PEAR 1.4.0a3
  • PHP PEAR 1.4.0a4
  • PHP PEAR 1.4.0a5
  • PHP PEAR 1.4.0a6
  • PHP PEAR 1.4.0a7
  • PHP PEAR 1.4.0a8
  • PHP PEAR 1.4.0a9
  • PHP PEAR 1.4.1
  • PHP PEAR 1.4.10 RC1
  • PHP PEAR 1.4.10
  • PHP PEAR 1.4.11
  • PHP PEAR 1.4.2
  • PHP PEAR 1.4.3
  • PHP PEAR 1.4.4
  • PHP PEAR 1.4.5
  • PHP PEAR 1.4.6
  • PHP PEAR 1.4.7
  • PHP PEAR 1.4.8
  • PHP PEAR 1.4.9
  • PHP PEAR 1.5.0
  • PHP PEAR 1.5.0 RC1
  • PHP PEAR 1.5.0 RC2
  • PHP PEAR 1.5.0 RC3
  • PHP PEAR 1.5.0a1
  • PHP PEAR 1.5.1
  • PHP PEAR 1.5.2
  • PHP PEAR 1.5.3

Reported:

May 07, 2007

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