CVE-2009-4018 EXPLOIT
7.5
HIGH · CVSS 2.0 · EPSS 11.3% (pctl 96)
Patch early
A public exploit exists.
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.
Scoring
| CVSS | 7.5 (HIGH, v2.0) |
|---|---|
| Vector | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| EPSS | 11.34% — more likely to be exploited than 96% of all CVEs |
| Weakness | CWE-264 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2009-11-29 |
| Last modified | 2026-06-16 |
Affected (1)
| Vendor | Product |
|---|---|
| php | php |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Kolang 4.3.10 < 5.3.0 - 'proc_open()' PHP 'safe_mode' Bypass | 2010-03-05 |
References
- http://bugs.php.net/bug.php?id=49026
- http://marc.info/?l=bugtraq&m=127680701405735&w=2
- http://marc.info/?l=oss-security&m=125886770008678&w=2
- http://marc.info/?l=oss-security&m=125897935330618&w=2
- http://secunia.com/advisories/40262
- http://secunia.com/advisories/41480
- http://secunia.com/advisories/41490
- http://svn.php.net/viewvc/?view=revision&revision=286360
- http://svn.php.net/viewvc/php/php-src/branches/PHP_5_2/ext/standard/proc_open.c?r1=286360&r2=286359&pathrev=286360
- http://svn.php.net/viewvc/php/php-src/branches/PHP_5_3/ext/standard/proc_open.c?r1=286360&r2=286359&pathrev=286360
- http://www.itrc.hp.com/service/cki/docDisplay.do?docId=emr_na-c02512995
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:303
- http://www.openwall.com/lists/oss-security/2009/11/23/15
- http://www.php.net/ChangeLog-5.php
- http://www.securityfocus.com/bid/37138
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7256
- http://bugs.php.net/bug.php?id=49026
- http://marc.info/?l=bugtraq&m=127680701405735&w=2
- http://marc.info/?l=oss-security&m=125886770008678&w=2
- http://marc.info/?l=oss-security&m=125897935330618&w=2
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