To: bugtraqat_private announceat_private security-alertsat_private ______________________________________________________________________________ Caldera International, Inc. Security Advisory Subject: Linux: mod_ssl off-by-one error Advisory number: CSSA-2002-031.0 Issue date: 2002 July 16 Cross reference: ______________________________________________________________________________ 1. Problem Description mod_ssl registers a rewrite_command hook when backward compatibility is enabled. The ssl_compat_directive() is called for every line read in a configuration file, and contains an off-by-one error while doing so. 2. Vulnerable Supported Versions System Package ---------------------------------------------------------------------- OpenLinux 3.1.1 Server prior to mod_ssl-2.8.5_1.3.22-3.i386.rpm prior to mod_ssl-sxnet-2.8.5_1.3.22-3.i386.rpm OpenLinux 3.1.1 Workstation prior to mod_ssl-2.8.5_1.3.22-3.i386.rpm prior to mod_ssl-sxnet-2.8.5_1.3.22-3.i386.rpm OpenLinux 3.1 Server prior to mod_ssl-2.8.5_1.3.22-3.i386.rpm prior to mod_ssl-sxnet-2.8.5_1.3.22-3.i386.rpm OpenLinux 3.1 Workstation prior to mod_ssl-2.8.5_1.3.22-3.i386.rpm prior to mod_ssl-sxnet-2.8.5_1.3.22-3.i386.rpm 3. Solution The proper solution is to install the latest packages. Many customers find it easier to use the Caldera System Updater, called cupdate (or kcupdate under the KDE environment), to update these packages rather than downloading and installing them by hand. 4. OpenLinux 3.1.1 Server 4.1 Package Location ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1.1/Server/current/RPMS 4.2 Packages c998c03318358630584215190a470c9c mod_ssl-2.8.5_1.3.22-3.i386.rpm 1586b281a0888d306cb5efe35ff86954 mod_ssl-sxnet-2.8.5_1.3.22-3.i386.rpm 4.3 Installation rpm -Fvh mod_ssl-2.8.5_1.3.22-3.i386.rpm rpm -Fvh mod_ssl-sxnet-2.8.5_1.3.22-3.i386.rpm 4.4 Source Package Location ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1.1/Server/current/SRPMS 4.5 Source Packages 850ea026cc10315dce3dbaef9feabc8c mod_ssl-2.8.5_1.3.22-3.src.rpm 5. OpenLinux 3.1.1 Workstation 5.1 Package Location ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1.1/Workstation/current/RPMS 5.2 Packages ef912916b08251e9f6b0876a8c052b8f mod_ssl-2.8.5_1.3.22-3.i386.rpm d57dae4310139ce3ea0e3979e643a9ac mod_ssl-sxnet-2.8.5_1.3.22-3.i386.rpm 5.3 Installation rpm -Fvh mod_ssl-2.8.5_1.3.22-3.i386.rpm rpm -Fvh mod_ssl-sxnet-2.8.5_1.3.22-3.i386.rpm 5.4 Source Package Location ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1.1/Workstation/current/SRPMS 5.5 Source Packages c34cc1e566f049573dc41b1323849101 mod_ssl-2.8.5_1.3.22-3.src.rpm 6. OpenLinux 3.1 Server 6.1 Package Location ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Server/current/RPMS 6.2 Packages 3711fdb7fbc8a8f0dd0b5c2408709872 mod_ssl-2.8.5_1.3.22-3.i386.rpm 0522228a7472586099b91a499a9b2b4f mod_ssl-sxnet-2.8.5_1.3.22-3.i386.rpm 6.3 Installation rpm -Fvh mod_ssl-2.8.5_1.3.22-3.i386.rpm rpm -Fvh mod_ssl-sxnet-2.8.5_1.3.22-3.i386.rpm 6.4 Source Package Location ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Server/current/SRPMS 6.5 Source Packages bf52c48ab7e18daa6cea04928fb85419 mod_ssl-2.8.5_1.3.22-3.src.rpm 7. OpenLinux 3.1 Workstation 7.1 Package Location ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Workstation/current/RPMS 7.2 Packages 0769c955e7be0acee8a78929cbb9d96c mod_ssl-2.8.5_1.3.22-3.i386.rpm 4d6773201e7ebd88fb2153e7eaca13b0 mod_ssl-sxnet-2.8.5_1.3.22-3.i386.rpm 7.3 Installation rpm -Fvh mod_ssl-2.8.5_1.3.22-3.i386.rpm rpm -Fvh mod_ssl-sxnet-2.8.5_1.3.22-3.i386.rpm 7.4 Source Package Location ftp://ftp.caldera.com/pub/updates/OpenLinux/3.1/Workstation/current/SRPMS 7.5 Source Packages ad1ede2408cf40e319fc647986eca21b mod_ssl-2.8.5_1.3.22-3.src.rpm 8. References Specific references for this advisory: http://www.modssl.org/ Caldera security resources: http://www.caldera.com/support/security/index.html This security fix closes Caldera incidents sr866328, fz521400, erg712092. 9. 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 products. 10. Acknowledgements Frank Denis (jat_private) discovered and researched this vulnerability. ______________________________________________________________________________
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