ACal Project login.php authentication bypass

acal-login-auth-bypass (24104)

High Risk

Description:

ACal Project could allow a remote attacker bypass authentication, caused by a vulnerability in the login.php script. The ACalAuthenticate cookie parameter is used to determine if a user has been successfully authenticated. A remote attacker could manually set this parameter in a specially-crafted URL request to bypass authentication and gain unauthorized access to the application.

*CVSS:

Base Score:	7
Access Vector:	Remote
Access Complexity:	Low
Authentication:	Not Required
Confidentiality Impact:	Partial
Integrity Impact:	Partial
Availability Impact:	Partial
Temporal Score:	5.2
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of ACal Project (2.2.6 or later), available from the ACal Project Web site. See References.

References:

• ACal Project Web site: SourceForge.net: ACal Project.
• eVuln Advisory EV0025: ACal Authentication Bypass & PHP Code Insertion.
• CVE-2006-0182: login.php in ACal Calendar Project 2.2.5 allows remote attackers to bypass authentication by setting the ACalAuthenticate cookie variable to inside.
• OSVDB ID: 22344: ACal login.php ACalAuthenticate Cookie Manipulation Authentication Bypass
• SA18432: ACal "ACalAuthenticate" Authentication Bypass Vulnerability
• VUPEN/ADV-2006-0152: ACal Project Code Execution and Authentication Bypass Vulnerabilities

Platforms Affected:

• ACal Project ACal Project 2.2.5

Reported:

Jan 11, 2006

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