CVE-2009-4018

Public Exploit

Description

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.

Category

7.5
CVSS
Severity: High
CVSS 2.0 •
EPSS 17.76% Top 10%
Vendor Advisory marc.info Vendor Advisory hp.com Vendor Advisory mandriva.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://secunia.com/advisories/40262 third party advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7256 vdb entry signature
http://marc.info/?l=bugtraq&m=127680701405735&w=2 vendor advisory
http://svn.php.net/viewvc/php/php-src/branches/PHP_5_2/ext/standard/proc_open.c?r1=286360&r2=286359&pathrev=286360 patch
http://marc.info/?l=oss-security&m=125897935330618&w=2 mailing list patch
http://secunia.com/advisories/41490 third party advisory
http://www.openwall.com/lists/oss-security/2009/11/23/15 mailing list patch
http://www.itrc.hp.com/service/cki/docDisplay.do?docId=emr_na-c02512995 vendor advisory
http://www.php.net/ChangeLog-5.php
http://www.securityfocus.com/bid/37138 vdb entry
http://bugs.php.net/bug.php?id=49026 patch exploit
http://secunia.com/advisories/41480 third party advisory
http://marc.info/?l=oss-security&m=125886770008678&w=2 mailing list patch
http://svn.php.net/viewvc/?view=revision&revision=286360 patch
http://svn.php.net/viewvc/php/php-src/branches/PHP_5_3/ext/standard/proc_open.c?r1=286360&r2=286359&pathrev=286360 patch
http://www.mandriva.com/security/advisories?name=MDVSA-2009:303 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2009-4018?
CVE-2009-4018 has been scored as a high severity vulnerability.
How to fix CVE-2009-4018?
To fix CVE-2009-4018, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2009-4018 being actively exploited in the wild?
It is possible that CVE-2009-4018 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~18% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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