high
7.5
CWE
264
Advisory Published
Updated

CVE-2009-4018

First published: Fri Nov 27 2009(Updated: )

The proc_open function in ext/standard/proc_open.c in PHP before 5.2.11 and 5.3.x before 5.3.1 does not enforce the (1) safe_mode_allowed_env_vars and (2) safe_mode_protected_env_vars directives, which allows context-dependent attackers to execute programs with an arbitrary environment via the env parameter, as demonstrated by a crafted value of the LD_LIBRARY_PATH environment variable.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
PHP=4.3.9
PHP=4.4.9
PHP=3.0
PHP=5.2.9
PHP=4.0-beta1
PHP=3.0.5
PHP=3.0.11
PHP=5.1.5
PHP=5.1.2
PHP=4.0-beta4
PHP=4.2.0
PHP=5.1.1
PHP=3.0.1
PHP=3.0.2
PHP=4.4.4
PHP=5.0.0-beta1
PHP=4.1.0
PHP=5.1.6
PHP=4.3.4
PHP=4.0.4
PHP=4.3.0
PHP=4.0.5
PHP=5.0-rc1
PHP=5.2.7
PHP=5.2.2
PHP=3.0.8
PHP=5.0.5
PHP=4.3.6
PHP=3.0.13
PHP=5.0.1
PHP=4.0.7-rc4
PHP=5.1.4
PHP=4.0.7-rc2
PHP=4.3.7
PHP=5.0.4
PHP=4.0.7-rc1
PHP=4.2.2
PHP<=5.2.10
PHP=4.4.2
PHP=4.0-rc1
PHP=3.0.7
PHP=4.3.2
PHP=4.3.11
PHP=4.0.0
PHP=3.0.6
PHP=4.0.3-patch1
PHP=3.0.17
PHP=4.0.7
PHP=4
PHP=4.0.2
PHP=4.3.3
PHP=5.0-rc3
PHP=2.0
PHP=4.1.1
PHP=3.0.15
PHP=3.0.16
PHP=5.2.6
PHP=5.3.0
PHP=4.4.3
PHP=5.0.0-rc2
PHP=5.0.3
PHP=3.0.10
PHP=3.0.4
PHP=4.2.3
PHP=5.1.0
PHP=4.4.5
PHP=4.0.1-patch1
PHP=5.0.0-rc3
PHP=4.0
PHP=4.0-beta2
PHP=4.0.1-patch2
PHP=2.0b10
PHP=4.4.8
PHP=4.0.6
PHP=5.2.0
PHP=5.0-rc2
PHP=5.2.4
PHP=4.1.2
PHP=5.0.0-beta3
PHP=4.0.7-rc3
PHP=4.0-rc2
PHP=4.3.1
PHP=5.1.3
PHP=3.0.18
PHP=4.0-beta_4_patch1
PHP=4.4.0
PHP=4.3.10
PHP=4.2.1
PHP=5.0.0-rc1
PHP=4.0.4-patch1
PHP=4.0.1
PHP=1.0
PHP=5.0.2
PHP=4.4.6
PHP=3.0.12
PHP=4.2
PHP=4.4.1
PHP=4.0-beta3
PHP=4.0.3
PHP=3.0.14
PHP=3.0.9
PHP=3.0.3
PHP=5.0.0-beta4
PHP=5
PHP=5.0.0
PHP=4.3.8
PHP=4.3.5
PHP=5.0.0-beta2
PHP=5.2.8
PHP=4.4.7

Remedy

http://bugs.php.net/bug.php?id=49026

Remedy

http://marc.info/?l=oss-security&m=125886770008678&w=2

Remedy

http://marc.info/?l=oss-security&m=125897935330618&w=2

Remedy

http://svn.php.net/viewvc/?view=revision&revision=286360

Remedy

http://svn.php.net/viewvc/php/php-src/branches/PHP_5_2/ext/standard/proc_open.c?r1=286360&r2=286359&pathrev=286360

Remedy

http://svn.php.net/viewvc/php/php-src/branches/PHP_5_3/ext/standard/proc_open.c?r1=286360&r2=286359&pathrev=286360

Remedy

http://www.openwall.com/lists/oss-security/2009/11/23/15

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2009-4018?

    CVE-2009-4018 has been classified as a critical vulnerability due to its ability to allow attackers to execute arbitrary programs with a malicious environment.

  • How do I fix CVE-2009-4018?

    To fix CVE-2009-4018, upgrade your PHP installation to version 5.2.11 or later, or 5.3.1 or later.

  • Which versions of PHP are affected by CVE-2009-4018?

    CVE-2009-4018 affects PHP versions before 5.2.11 and 5.3.x before 5.3.1, including several earlier versions.

  • What types of attacks can result from CVE-2009-4018?

    The vulnerability can lead to remote code execution, allowing attackers to run arbitrary code by manipulating the environment variables.

  • Is CVE-2009-4018 still a concern for users today?

    While CVE-2009-4018 primarily affects outdated PHP versions, any systems still utilizing these versions are at risk and should be updated.

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