PHP cURL library curl_init() security bypass

php-curlinit-security-bypass (39852) The risk level is classified as MediumMedium Risk

Description:

The PHP cURL library (libcurl) could allow a remote attacker to bypass security restrictions, caused by improper validation of user-supplied input by the curl_init() function. A remote attacker could exploit this vulnerability using a file:// request containing a NULL character to bypass safe mode restrictions and gain unauthorized read access to arbitrary files on Web servers that are running an affected version of PHP.

*CVSS:

Base Score: 5
  Access Vector: Network
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: None
  Availability Impact: None
 
Temporal Score: 3.7
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Bypass Security

Remedy:

Upgrade to the latest CVS version of the cURL library, available from the PHP CVS Repository. See References.

For other distributions:
Apply the appropriate upgrade for your system. See References.

References:

Platforms Affected:

  • Apple Mac OS X 10.4
  • Apple Mac OS X 10.4.1
  • Apple Mac OS X 10.4.10
  • Apple Mac OS X 10.4.11
  • Apple Mac OS X 10.4.2
  • Apple Mac OS X 10.4.3
  • Apple Mac OS X 10.4.4
  • Apple Mac OS X 10.4.5
  • Apple Mac OS X 10.4.6
  • Apple Mac OS X 10.4.7
  • Apple Mac OS X 10.4.8
  • Apple Mac OS X 10.4.9
  • Apple Mac OS X 10.5.4
  • Apple Mac OS X Server 10.4
  • Apple Mac OS X Server 10.4.1
  • Apple Mac OS X Server 10.4.10
  • Apple Mac OS X Server 10.4.11
  • Apple Mac OS X Server 10.4.2
  • Apple Mac OS X Server 10.4.3
  • Apple Mac OS X Server 10.4.4
  • Apple Mac OS X Server 10.4.5
  • Apple Mac OS X Server 10.4.6
  • Apple Mac OS X Server 10.4.7
  • Apple Mac OS X Server 10.4.8
  • Apple Mac OS X Server 10.4.9
  • Apple Mac OS X Server 10.5
  • Apple Mac OS X Server 10.5.1
  • Apple Mac OS X Server 10.5.2
  • Apple Mac OS X Server 10.5.3
  • Apple Mac OS X Server 10.5.4
  • Apple Mac OS X Server 10.5.5
  • Canonical Ubuntu 6.06 LTS
  • Canonical Ubuntu 7.04
  • Canonical Ubuntu 7.10
  • Canonical Ubuntu 8.04 LTS
  • MandrakeSoft Mandrake Linux 2008.0 X86_64
  • MandrakeSoft Mandrake Linux 2008.0
  • MandrakeSoft Mandrake Linux Corporate Server 4.0
  • MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
  • PHP PHP 5.0.0 RC1
  • PHP PHP 5.0.0 Beta2
  • PHP PHP 5.0.0 Beta3
  • PHP PHP 5.0.0
  • PHP PHP 5.0.0 RC3
  • PHP PHP 5.0.0 RC2
  • PHP PHP 5.0.0 Beta1
  • PHP PHP 5.0.0 Beta4
  • PHP PHP 5.0.1
  • PHP PHP 5.0.2
  • PHP PHP 5.0.3
  • PHP PHP 5.0.4
  • PHP PHP 5.0.5
  • PHP PHP 5.1.0
  • PHP PHP 5.1.1
  • PHP PHP 5.1.2
  • PHP PHP 5.1.3
  • PHP PHP 5.1.4
  • PHP PHP 5.1.5
  • PHP PHP 5.1.6
  • PHP PHP 5.2.0
  • PHP PHP 5.2.1
  • PHP PHP 5.2.2
  • PHP PHP 5.2.3
  • PHP PHP 5.2.4
  • PHP PHP 5.2.5
  • Turbolinux Appliance Server 3.0 x64
  • Turbolinux Appliance Server 3.0
  • Turbolinux Client 2008
  • Turbolinux Turbolinux 10 Server
  • Turbolinux Turbolinux 10 Server x64 Ed
  • Turbolinux Turbolinux 11 Server
  • Turbolinux Turbolinux 11 Server x64 Ed
  • Turbolinux Turbolinux FUJI
  • Turbolinux Turbolinux Multimedia
  • Turbolinux Turbolinux Personal
  • Turbolinux Turbolinux Appliance Server 1.0 Hosting Ed
  • Turbolinux Turbolinux Appliance Server 1.0 Workgroup Ed
  • Turbolinux Turbolinux Appliance Server 2.0

Reported:

Jan 22, 2008

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* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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