CA 2E Web Option 8.1.2 - Authentication Bypass

Vulnerability title: Unauthenticated Privilege Escalation in CA 2E Web Option



CVE: CVE-2014-1219

Vendor: CA

Product: 2E Web Option

Affected version: 8.1.2

Fixed version: N/A

Reported by: Mike Emery



Details:



CA 2E Web Option (r8.1.2) and potentially others, is vulnerable to unauthenticated privilege escalation via a predictable session token.

The POST parameter session token W2E_SSNID appears as follows:



W2E_SSNID=W90NIxGoSsN1023ZYW2E735182000013CLSpKfgkCJSLKsc600061JKenjKnE

JuNX9GoVjCEbqIuKh6kFRvbzYnUxgQtONszJldyAar3LtTSwsmBLpdlPc5iDH4Zf75





However, this token is poorly validated, leading to



W2E_SSNID=W90NIxGoSsN1023ZYW2E735182000013



being accepted as a valid session. By incrementing and

decrementing the digits at the end of the value given above, it is

possible to control the session at the given ID. This token is sent as

part of the login page, and as such, can be manipulated by an

unauthenticated attacker, giving them access to any valid session.

Consequentially, it is possible to access the following page as such:



https://app.domain.co.uk/web2edoc/close.htm?SSNID=W90NIxGoSsN1023ZYW2E735182000026



Ending the session specified, which could lead to a denial of service condition.



Further details at:

http://portcullis-security.com/security-research-and-downloads/security-advisories/cve-2014-1219/





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