of OpenLinux 3.1 Server. If Squid is configured for accelerator mode
(setting http_accel_with_proxy off), any request to Squid is allowed.
Malicious users may use your proxy to portscan remote systems, forge
email, and other activities.
____________________________________________________________________________ Caldera International, Inc. Security Advisory Subject: Linux - Squid configuration problems Advisory number: CSSA-2001-029.0 Issue date: 2001, August 06 Cross reference: ____________________________________________________________________________ 1. Problem Description There is a security problem with Squid, a proxy server shipped as part of OpenLinux 3.1 Server. If Squid is configured for accelerator mode (setting http_accel_with_proxy off), any request to Squid is allowed. Malicious users may use your proxy to portscan remote systems, forge email, and other activities. 2. Vulnerable Versions System Package ----------------------------------------------------------- OpenLinux 2.3 not vulnerable OpenLinux eServer 2.3.1 not vulnerable and OpenLinux eBuilder OpenLinux eDesktop 2.4 not vulnerable OpenLinux Server 3.1 All packages previous to squid-2.4.STABLE/1-7 OpenLinux Workstation 3.1 not vulnerable 3. Solution Workaround none The proper solution is to upgrade to the latest packages. 4. OpenLinux 2.3 not vulnerable 5. OpenLinux eServer 2.3.1 and OpenLinux eBuilder for ECential 3.0 not vulnerable 6. OpenLinux eDesktop 2.4 not vulnerable 7. OpenLinux 3.1 Server 7.1 Location of Fixed Packages The upgrade packages can be found on Caldera's FTP site at: ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Server/current/RPMS The corresponding source code package can be found at: ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Server/current/SRPMS 7.2 Verification 1779083edd38872f2ac15c219131d1ba RPMS/squid-2.4.STABLE1-7.i386.rpm e5020ebf7aef60878139cdac81737212 SRPMS/squid-2.4.STABLE1-7.src.rpm 7.3 Installing Fixed Packages Upgrade the affected packages with the following commands: rpm -Fvh squid-2.4.STABLE1-7.i386.rpm 8. OpenLinux 3.1 Workstation not vulnerable 9. References This and other Caldera security resources are located at: http://www.caldera.com/support/security/index.html This security fix closes Caldera's internal Problem Report 10294. 10. Disclaimer Caldera International, Inc. is not responsible for the misuse of any of the information we provide on this website and/or through our security advisories. Our advisories are a service to our customers intended to promote secure installation and use of Caldera OpenLinux.