Vulnerability Monitor

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CVE-2012-2311

sapi/cgi/cgi_main.c in PHP before 5.3.13 and 5.4.x before 5.4.3, when configured as a CGI script (aka php-cgi), does not properly handle query strings that contain a %3D sequence but no = (equals sign) character, which allows remote attackers to execute arbitrary code by placing command-line options in the query string, related to lack of skipping a certain php_getopt for the 'd' case. NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-1823.

Security Impact Summary

CVE-2012-2311 is a security vulnerability that . Impacting 1 product from php organizations running these solutions should prioritize assessment and patching.

Historical Context

Documented in 2012, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.

Published

2012-05-11T10:15:48.107

Last Modified

2026-04-29T01:13:23.040

Status

Modified

Source

[email protected]

Severity

CVSSv2: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: PARTIAL
  • Availability Impact: PARTIAL
Exploitability Score

10.0

Impact Score

6.4

Weaknesses
  • Type: Primary
    CWE-89
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application php php ≤ 5.3.12 Yes
Application php php 1.0 Yes
Application php php 2.0 Yes
Application php php 2.0b10 Yes
Application php php 3.0 Yes
Application php php 3.0.1 Yes
Application php php 3.0.2 Yes
Application php php 3.0.3 Yes
Application php php 3.0.4 Yes
Application php php 3.0.5 Yes
Application php php 3.0.6 Yes
Application php php 3.0.7 Yes
Application php php 3.0.8 Yes
Application php php 3.0.9 Yes
Application php php 3.0.10 Yes
Application php php 3.0.11 Yes
Application php php 3.0.12 Yes
Application php php 3.0.13 Yes
Application php php 3.0.14 Yes
Application php php 3.0.15 Yes
Application php php 3.0.16 Yes
Application php php 3.0.17 Yes
Application php php 3.0.18 Yes
Application php php 4.0 Yes
Application php php 4.0 Yes
Application php php 4.0 Yes
Application php php 4.0 Yes
Application php php 4.0 Yes
Application php php 4.0.0 Yes
Application php php 4.0.1 Yes
Application php php 4.0.2 Yes
Application php php 4.0.3 Yes
Application php php 4.0.4 Yes
Application php php 4.0.5 Yes
Application php php 4.0.6 Yes
Application php php 4.0.7 Yes
Application php php 4.1.0 Yes
Application php php 4.1.1 Yes
Application php php 4.1.2 Yes
Application php php 4.2.0 Yes
Application php php 4.2.1 Yes
Application php php 4.2.2 Yes
Application php php 4.2.3 Yes
Application php php 4.3.0 Yes
Application php php 4.3.1 Yes
Application php php 4.3.2 Yes
Application php php 4.3.3 Yes
Application php php 4.3.4 Yes
Application php php 4.3.5 Yes
Application php php 4.3.6 Yes
Application php php 4.3.7 Yes
Application php php 4.3.8 Yes
Application php php 4.3.9 Yes
Application php php 4.3.10 Yes
Application php php 4.3.11 Yes
Application php php 4.4.0 Yes
Application php php 4.4.1 Yes
Application php php 4.4.2 Yes
Application php php 4.4.3 Yes
Application php php 4.4.4 Yes
Application php php 4.4.5 Yes
Application php php 4.4.6 Yes
Application php php 4.4.7 Yes
Application php php 4.4.8 Yes
Application php php 4.4.9 Yes
Application php php 5.0.0 Yes
Application php php 5.0.0 Yes
Application php php 5.0.0 Yes
Application php php 5.0.0 Yes
Application php php 5.0.0 Yes
Application php php 5.0.0 Yes
Application php php 5.0.0 Yes
Application php php 5.0.0 Yes
Application php php 5.0.1 Yes
Application php php 5.0.2 Yes
Application php php 5.0.3 Yes
Application php php 5.0.4 Yes
Application php php 5.0.5 Yes
Application php php 5.1.0 Yes
Application php php 5.1.1 Yes
Application php php 5.1.2 Yes
Application php php 5.1.3 Yes
Application php php 5.1.4 Yes
Application php php 5.1.5 Yes
Application php php 5.1.6 Yes
Application php php 5.2.0 Yes
Application php php 5.2.1 Yes
Application php php 5.2.2 Yes
Application php php 5.2.3 Yes
Application php php 5.2.4 Yes
Application php php 5.2.5 Yes
Application php php 5.2.6 Yes
Application php php 5.2.7 Yes
Application php php 5.2.8 Yes
Application php php 5.2.9 Yes
Application php php 5.2.10 Yes
Application php php 5.2.11 Yes
Application php php 5.2.12 Yes
Application php php 5.2.13 Yes
Application php php 5.2.14 Yes
Application php php 5.2.15 Yes
Application php php 5.2.16 Yes
Application php php 5.2.17 Yes
Application php php 5.3.0 Yes
Application php php 5.3.1 Yes
Application php php 5.3.2 Yes
Application php php 5.3.3 Yes
Application php php 5.3.4 Yes
Application php php 5.3.5 Yes
Application php php 5.3.6 Yes
Application php php 5.3.7 Yes
Application php php 5.3.8 Yes
Application php php 5.3.9 Yes
Application php php 5.3.10 Yes
Application php php 5.3.11 Yes
Application php php 5.4.0 Yes
Application php php 5.4.0 Yes
Application php php 5.4.1 Yes
Application php php 5.4.2 No
References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For php's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.