ProFTPD Auth API security bypass
| proftpd-authapi-security-bypass (33733) |  Medium Risk |
Description:
ProFTPD could allow a remote attacker to bypass security restrictions, caused by a vulnerability in the Auth API authentication modules. ProFTPD allows multiple authentication modules to run simultaneously. If the authentication modules are set with inconsistent policies, a remote attacker could exploit this vulnerability to bypass security restrictions and possibly gain unauthorized access to the system.
*CVSS:
| Base Score: | 7 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | Partial |
| Temporal Score: | 5.4 |
| Exploitability: | Unproven |
| Remediation Level: | Temporary-Fix |
| Report Confidence: | Confirmed |
Consequences:
Bypass Security
Remedy:
Refer to Bugzilla Bug 2922 for patch information. See References.
For Mandriva Linux:
Refer to MDKSA-2007:130 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
References:
- Bugzilla Bug 2922: Auth API allows one auth module to authenticate user data provided by a different auth module.
- Debian Bug report logs - #419255: proftpd allows logins with almost no password if configured with SQLAuthTypes Plaintext.
- ProFTPD Web site: The ProFTPD Project: Home.
- BID-23546: ProFTPD AUTH Multiple Authentication Module Security Bypass Vulnerability
- CVE-2007-2165: The Auth API in ProFTPD before 20070417, when multiple simultaneous authentication modules are configured, does not require that the module that checks authentication is the same as the module that retrieves authentication data, which might allow remote attackers to bypass authentication, as demonstrated by use of SQLAuthTypes Plaintext in mod_sql, with data retrieved from /etc/passwd.
- MDKSA-2007:130: Updated proftpd packages fix authentication bypass vulnerability
- SA24867: ProFTPD Auth API Multiple Authentication Modules Security Issue
- SECTRACK ID: 1017931: ProFTPD Auth API State Error May Let Remote Users Access the System in Certain Cases
- VUPEN/ADV-2007-1444: ProFTPD Auth API Multiple Authentication Module Data Handling Security Bypass Issue
Platforms Affected:
- MandrakeSoft Mandrake Linux 2007 X86_64
- MandrakeSoft Mandrake Linux 2007
- MandrakeSoft Mandrake Linux 2007.1 X86_64
- MandrakeSoft Mandrake Linux 2007.1
- MandrakeSoft Mandrake Linux 2008.0 X86_64
- MandrakeSoft Mandrake Linux Corporate Server 3.0
- MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
- MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
- MandrakeSoft Mandrake Linux Corporate Server 4.0
- ProFTPD ProFTPD 1.2.10
Reported:
Apr 18, 2007
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* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.