ProFTPD CIDR entry ACL bypass
| proftpd-cidr-acl-bypass (16038) |  Medium Risk |
Description:
ProFTPD could allow a remote attacker to bypass Access Control Lists (ACL). If an ACL entry is CIDR (Classless Inter Domain Routing)-based, it will function as an AllowAll directive, which could allow a remote attacker to bypass the ACL.
Platforms Affected:
- Gentoo, Linux
- OpenPKG, OpenPKG 1.3
- OpenPKG, OpenPKG 2.0
- OpenPKG, OpenPKG CURRENT
- ProFTPD, ProFTPD 1.2.9
Remedy:
Upgrade to the latest version of ProFTPD (1.2.10rc1 or later), available from the ProFTPD Web page. See References.
For OpenPKG:
Refer to OpenPKG Security Advisory OpenPKG-SA-2004.018 for patch, upgrade, or suggested workaround information. See References.
Consequences:
Bypass Security
References:
- ProFTPD Web page, Bug 2267 - Broken IP subnet matching at http://bugs.proftpd.org/show_bug.cgi?id=2267.
- BID-10252: ProFTPD CIDR Access Control Rule Bypass Vulnerability
- CVE-2004-0432: ProFTPD 1.2.9 treats the Allow and Deny directives for CIDR based ACL entries as if they were AllowAll, which could allow FTP clients to bypass intended access restrictions.
- GLSA-200405-09: ProFTPD Access Control List bypass vulnerability
- MDKSA-2004:041: Updated ProFTPD packages fix vulnerability
- OpenPKG-SA-2004.018: ProFTPD
- SA11527: ProFTPD CIDR Addressing ACL and "site chgrp" Security Issues
Reported:
May 03, 2004
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 the author/distributor (Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
Copyright (c) 1994-2008 Internet Security Systems, Inc. All rights reserved worldwide.
For corrections or additions please email xforce@iss.net