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Vulnerability Details : CVE-2017-14143

The getUserzoneCookie function in Kaltura before 13.2.0 uses a hardcoded cookie secret to validate cookie signatures, which allows remote attackers to bypass an intended protection mechanism and consequently conduct PHP object injection attacks and execute arbitrary PHP code via a crafted userzone cookie.
Publish Date : 2017-09-19 Last Update Date : 2018-01-26
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- CVSS Scores & Vulnerability Types

CVSS Score
7.5
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 CodeBypass a restriction or similar
CWE ID 798

- Products Affected By CVE-2017-14143

# Product Type Vendor Product Version Update Edition Language
1 Application Kaltura Kaltura Server Mercury-13.1.0 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Kaltura Kaltura Server 1

- References For CVE-2017-14143

https://telekomsecurity.github.io/assets/advisories/20170912_kaltura-advisory.txt
https://www.exploit-db.com/exploits/43028/
EXPLOIT-DB 43028
https://www.exploit-db.com/exploits/43876/
EXPLOIT-DB 43876
http://www.securityfocus.com/bid/100976
BID 100976 Kaltura Community Edition Multiple Security Vulnerabilities Release Date:2017-09-25
https://github.com/kaltura/server/commit/6a6d14328b7a1493e8c47f9565461e5f88be20c9#diff-0770640cc76112cbf77bebc604852682 CONFIRM

- Metasploit Modules Related To CVE-2017-14143

Kaltura Remote PHP Code Execution over Cookie
This module exploits an Object Injection vulnerability in Kaltura. By exploiting this vulnerability, unauthenticated users can execute arbitrary code under the context of the web server user. Kaltura makes use of a hardcoded cookie secret which allows to sign arbitrary cookie data. After passing this signature check, the base64- decoded data is passed to PHPs unserialize() function which allows for code execution. The constructed object is again based on the SektionEins Zend code execution POP chain PoC. Kaltura versions prior to 13.1.0 are affected by this issue. A valid entry_id (which is required for this exploit) can be obtained from any media resource published on the kaltura installation. This module was tested against Kaltura 13.1.0-2 installed on Ubuntu 14.04.
Module type : exploit Rank : excellent Platforms : PHP


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