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Vulnerability Details : CVE-2012-1823

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.
Publish Date : 2012-05-11 Last Update Date : 2018-01-17
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute Code

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat critical
AV:N/AC:M/Au:N/C:P/I:P/A:P 2012-05-03 2012-05-03
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- Related OVAL Definitions

Title Definition Id Class Family
DEPRECATED: ELSA-2012-0547 -- php53 security update (critical) oval:org.mitre.oval:def:27762 unix
DEPRECATED: ELSA-2012-0546 -- php security update (critical) oval:org.mitre.oval:def:27715 unix
DEPRECATED: ELSA-2012:0546: php security update (Critical) oval:org.mitre.oval:def:23389 unix
DSA-2465-1 php5 - several oval:org.mitre.oval:def:18140 unix
ELSA-2012:0546: php security update (Critical) oval:org.mitre.oval:def:23798 unix
ELSA-2012:0547: php53 security update (Critical) oval:org.mitre.oval:def:22882 unix
HP-UX Apache Web Server running PHP, Remote Execution of Arbitrary Code, Privilege Elevation, Denial of Service (DoS) oval:org.mitre.oval:def:19063 unix
RHSA-2012:0546: php security update (Critical) oval:com.redhat.rhsa:def:20120546 unix
RHSA-2012:0546: php security update (Critical) oval:org.mitre.oval:def:21394 unix
RHSA-2012:0547: php53 security update (Critical) oval:com.redhat.rhsa:def:20120547 unix
RHSA-2012:0547: php53 security update (Critical) oval:org.mitre.oval:def:21416 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2012-1823

# Product Type Vendor Product Version Update Edition Language
1 Application PHP PHP 5.0.0 RC1 Version Details Vulnerabilities
2 Application PHP PHP 5.0.0 Version Details Vulnerabilities
3 Application PHP PHP 5.0.0 RC2 Version Details Vulnerabilities
4 Application PHP PHP 5.0.0 Beta1 Version Details Vulnerabilities
5 Application PHP PHP 5.0.0 RC3 Version Details Vulnerabilities
6 Application PHP PHP 5.0.0 Beta2 Version Details Vulnerabilities
7 Application PHP PHP 5.0.0 Beta3 Version Details Vulnerabilities
8 Application PHP PHP 5.0.0 Beta4 Version Details Vulnerabilities
9 Application PHP PHP 5.0.1 Version Details Vulnerabilities
10 Application PHP PHP 5.0.2 Version Details Vulnerabilities
11 Application PHP PHP 5.0.3 Version Details Vulnerabilities
12 Application PHP PHP 5.0.4 Version Details Vulnerabilities
13 Application PHP PHP 5.0.5 Version Details Vulnerabilities
14 Application PHP PHP 5.1.0 Version Details Vulnerabilities
15 Application PHP PHP 5.1.1 Version Details Vulnerabilities
16 Application PHP PHP 5.1.2 Version Details Vulnerabilities
17 Application PHP PHP 5.1.3 Version Details Vulnerabilities
18 Application PHP PHP 5.1.4 Version Details Vulnerabilities
19 Application PHP PHP 5.1.5 Version Details Vulnerabilities
20 Application PHP PHP 5.1.6 Version Details Vulnerabilities
21 Application PHP PHP 5.2.0 Version Details Vulnerabilities
22 Application PHP PHP 5.2.1 Version Details Vulnerabilities
23 Application PHP PHP 5.2.2 Version Details Vulnerabilities
24 Application PHP PHP 5.2.3 Version Details Vulnerabilities
25 Application PHP PHP 5.2.4 Version Details Vulnerabilities
26 Application PHP PHP 5.2.5 Version Details Vulnerabilities
27 Application PHP PHP 5.2.6 Version Details Vulnerabilities
28 Application PHP PHP 5.2.7 Version Details Vulnerabilities
29 Application PHP PHP 5.2.8 Version Details Vulnerabilities
30 Application PHP PHP 5.2.9 Version Details Vulnerabilities
31 Application PHP PHP 5.2.10 Version Details Vulnerabilities
32 Application PHP PHP 5.2.11 Version Details Vulnerabilities
33 Application PHP PHP 5.2.12 Version Details Vulnerabilities
34 Application PHP PHP 5.2.13 Version Details Vulnerabilities
35 Application PHP PHP 5.2.14 Version Details Vulnerabilities
36 Application PHP PHP 5.2.15 Version Details Vulnerabilities
37 Application PHP PHP 5.2.16 Version Details Vulnerabilities
38 Application PHP PHP 5.2.17 Version Details Vulnerabilities
39 Application PHP PHP 5.3.0 Version Details Vulnerabilities
40 Application PHP PHP 5.3.1 Version Details Vulnerabilities
41 Application PHP PHP 5.3.2 Version Details Vulnerabilities
42 Application PHP PHP 5.3.3 Version Details Vulnerabilities
43 Application PHP PHP 5.3.4 Version Details Vulnerabilities
44 Application PHP PHP 5.3.5 Version Details Vulnerabilities
45 Application PHP PHP 5.3.6 Version Details Vulnerabilities
46 Application PHP PHP 5.3.7 Version Details Vulnerabilities
47 Application PHP PHP 5.3.8 Version Details Vulnerabilities
48 Application PHP PHP 5.3.9 Version Details Vulnerabilities
49 Application PHP PHP 5.3.10 Version Details Vulnerabilities
50 Application PHP PHP 5.3.11 Version Details Vulnerabilities
51 Application PHP PHP 5.4.0 Version Details Vulnerabilities
52 Application PHP PHP 5.4.1 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions

- References For CVE-2012-1823 CONFIRM
CERT-VN VU#520827
HP SSRT100856
REDHAT RHSA-2012:0569
REDHAT RHSA-2012:0547
REDHAT RHSA-2012:0546
SUSE openSUSE-SU-2012:0590
REDHAT RHSA-2012:0568
SECTRACK 1027022
SUSE SUSE-SU-2012:0604
HP SSRT100877
APPLE APPLE-SA-2012-09-19-2

- Metasploit Modules Related To CVE-2012-1823

PHP CGI Argument Injection
When run as a CGI, PHP up to version 5.3.12 and 5.4.2 is vulnerable to an argument injection vulnerability. This module takes advantage of the -d flag to set php.ini directives to achieve code execution. From the advisory: "if there is NO unescaped '=' in the query string, the string is split on '+' (encoded space) characters, urldecoded, passed to a function that escapes shell metacharacters (the "encoded in a system-defined manner" from the RFC) and then passes them to the CGI binary." This module can also be used to exploit the plesk 0day disclosed by kingcope and exploited in the wild on June 2013.
Module type : exploit Rank : excellent Platforms : PHP

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