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CVE-2011-4203

Date: December 22, 2011

CRLF injection vulnerability in calendar/set.php in the Calendar component in Moodle 1.9.x before 1.9.15, 2.0.x before 2.0.6, 2.1.x before 2.1.3, and 2.2 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via vectors involving the url variable.

Language: PHP

Severity Score

Related Resources (11)

http://penturalabs.wordpress.com/2011/12/13/advisory-crlf-injection-vulnerability-in-moodle
https://nvd.nist.gov/vuln/detail/CVE-2011-4203
https://github.com/moodle/moodle
https://moodle.org/mod/forum/discuss.php?d=191754
https://github.com/moodle/moodle/commit/bc577df6a974606fcb0882b090b00ea5a4e10cf6
https://github.com/moodle/moodle/commit/e311b14364719b0f7851149ee51c1a4ec732635e
http://penturalabs.wordpress.com/2011/12/13/advisory-crlf-injection-vulnerability-in-moodle/
https://github.com/moodle/moodle/commit/ae7cc577b7115a7ad7a68dc4986aca9e2bda2cf5
https://github.com/moodle/moodle/commit/581e8dba387f090d89382115fd850d8b44351526
http://tracker.moodle.org/browse/MDL-24808
https://www.mend.io/vulnerability-database/CVE-2011-4203

Severity Score

Weakness Type (CWE)

Improper Control of Generation of Code ('Code Injection')

CWE-94

Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')

CWE-113

Improper Neutralization of CRLF Sequences ('CRLF Injection')

CWE-93

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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