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CVE-2012-1823

CRITICAL
9.8
CVSS Score
Published: May 11, 2012 at 10:00 AM UTC
Updated: June 16, 2026 at 11:40 PM UTC
17 products affected across 8 vendorsmacOSDebian LinuxFedora

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Severity
CRITICAL9.8
Exploitation
CISA KEV
Exploit prediction
EPSS 100%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score100.0%

EPSS (Exploit Prediction Scoring System) estimates a 100.0% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

sapi/cgi/cgi_main.c in PHP, when configured as a CGI script, does not properly handle query strings, which allows remote attackers to execute arbitrary code.

Required Action
Apply updates per vendor instructions.
Ransomware Use
Unknown
Added to KEV
Mar 25, 2022
Remediation Due
Apr 15, 2022
1656 days overdue
Notes
https://nvd.nist.gov/vuln/detail/CVE-2012-1823

Description

sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI script (aka php-cgi), does not properly handle query strings that lack an = (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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

macOS· Apple
95%
10.6.8 ≤ v < 10.7.510.8.0 ≤ v < 10.8.2
Affected range stops below 10.7.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.8.2, so it looks safe — our inference, not a vendor statement
Debian Linux· Debiandrupal
95%
6.0
Fedora· Fedora Projectrpm
95%
3940
HP Ux· HP
95%
b.11.23b.11.31
openSUSE· openSUSE
95%
11.412.1
PHP· PHPdrupal
95%
v < 5.3.125.4.0 ≤ v < 5.4.2
Affected range stops below 5.3.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.4.2, so it looks safe — our inference, not a vendor statement
Application Stack· Red Hat
95%
2.0
Enterprise Linux Desktop· Red Hatrubygems
95%
6.0
Enterprise Linux Eus· Red Hatrpm
95%
5.66.16.2
Enterprise Linux Server· Red Hatrubygems
95%
5.06.0

References (31)

Broken LinkExploit
Source: [email protected]
http://eindbazen.net/2012/05/php-cgi-advisory-cve-2012-1823/
Vendor Advisoryx_refsource_HPBroken Link
Source: [email protected]
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041
Vendor Advisoryx_refsource_APPLEMailing ListThird Party Advisory
Source: [email protected]
http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html
Vendor AdvisoryMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00002.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00007.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00011.html
Vendor Advisoryx_refsource_HPMailing List
Source: [email protected]
http://marc.info/?l=bugtraq&m=134012830914727&w=2
Vendor AdvisoryThird Party Advisory
Source: [email protected]
http://rhn.redhat.com/errata/RHSA-2012-0546.html

SSVC — Action Prioritization

SSVCActiveAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICALCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-77

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