7270868 2001-10-10 19:19 -0200 /100 rader/ <secure@conectiva.com.br> Sänt av: joel@lysator.liu.se Importerad: 2001-10-11 00:28 av Brevbäraren Extern mottagare: conectiva-updates@papaleguas.conectiva.com.br Extern mottagare: linuxlist@securityportal.com Extern mottagare: lwn@lwn.net Extern mottagare: bugtraq@securityfocus.com Extern mottagare: security-alerts@linuxsecurity.com Mottagare: Bugtraq (import) <19406> Ärende: [CLA-2001:429] Conectiva Linux Security Announcement - htdig ------------------------------------------------------------ From: secure@conectiva.com.br To: conectiva-updates@papaleguas.conectiva.com.br, linuxlist@securityportal.com, lwn@lwn.net, bugtraq@securityfocus.com, security-alerts@linuxsecurity.com Message-ID: <200110102119.TAA22384@frajuto.distro.conectiva> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - -------------------------------------------------------------------------- PACKAGE : htdig SUMMARY : ht://Dig DoS and remote exposure DATE : 2001-10-10 19:17:00 ID : CLA-2001:429 RELEVANT RELEASES : 5.0, 5.1, 6.0, 7.0 - ------------------------------------------------------------------------- DESCRIPTION The ht://Dig system is a complete world wide web indexing and searching system for a small domain or intranet. The htsearch program is the component used for queries and can be used with a web server using a cgi interface. Nergal <nergal at 7bulls.com> reported[1] a vulnerability in htsearch wich allows a remote user to pass the -c parameter (use specific config file) to the program even when it's running as a cgi. A malicious user could point to a file like /dev/zero and let the server run in an endless loop, trying to read config parameters from there. Also, if the user has write permission on the server and can create a file with specific entries, he/she can point the server to it and retrive any file readable by the webserver UID. SOLUTION All htdig users should upgrade. REFERENCES: 1.http://sourceforge.net/tracker/index.php?func=detail&aid=458013&group_id=4593& atid=104593 DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES ftp://atualizacoes.conectiva.com.br/5.0/i386/htdig-3.1.5-2U50_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/5.0/SRPMS/htdig-3.1.5-2U50_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/5.1/i386/htdig-3.1.5-2U51_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/5.1/SRPMS/htdig-3.1.5-2U51_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/htdig-3.1.5-5U60_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/htdig-3.1.5-5U60_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/htdig-3.1.5-10U70_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/htdig-doc-3.1.5-10U70_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/htdig-3.1.5-10U70_1cl.src.rpm ADDITIONAL INSTRUCTIONS Users of Conectiva Linux version 6.0 or higher may use apt to perform upgrades of RPM packages: - add the following line to /etc/apt/sources.list if it is not there yet (you may also use linuxconf to do this): rpm [cncbr] ftp://atualizacoes.conectiva.com.br 6.0/conectiva updates (replace 6.0 with the correct version number if you are not running CL6.0) - run: apt-get update - after that, execute: apt-get upgrade Detailed instructions reagarding the use of apt and upgrade examples can be found at http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en - ------------------------------------------------------------------------- All packages are signed with Conectiva's GPG key. The key and instructions on how to import it can be found at http://distro.conectiva.com.br/seguranca/chave/?idioma=en Instructions on how to check the signatures of the RPM packages can be found at http://distro.conectiva.com.br/seguranca/politica/?idioma=en - ------------------------------------------------------------------------- All our advisories and generic update instructions can be viewed at http://distro.conectiva.com.br/atualizacoes/?idioma=en - ------------------------------------------------------------------------- subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE7xLtk42jd0JmAcZARAhKVAKDiZhDths7YPkruj8hkINXJnQxRWgCeMFIM Mqb38XocMo3NHK9XBrNdGSg= =iZpE -----END PGP SIGNATURE----- (7270868) / <secure@conectiva.com.br>/----(Ombruten) Kommentar i text 7275659 av Geoff Hutchison <ghutchis@wso.williams.edu> 7275659 2001-10-10 22:00 -0500 /30 rader/ Geoff Hutchison <ghutchis@wso.williams.edu> Sänt av: joel@lysator.liu.se Importerad: 2001-10-11 17:34 av Brevbäraren Extern mottagare: secure@conectiva.com.br Extern kopiemottagare: bugtraq@securityfocus.com Extern kopiemottagare: lwn@lwn.net Mottagare: Bugtraq (import) <19409> Kommentar till text 7270868 av <secure@conectiva.com.br> Ärende: Re: [CLA-2001:429] Conectiva Linux Security Announcement - htdig ------------------------------------------------------------ From: Geoff Hutchison <ghutchis@wso.williams.edu> To: secure@conectiva.com.br Cc: bugtraq@securityfocus.com, lwn@lwn.net Message-ID: <a05100301b7eaba5e100c@[129.105.9.200]> At 7:19 PM -0200 10/10/01, secure@conectiva.com.br wrote: >A malicious user could point to a file like /dev/zero and let > the server run in an endless loop, trying to read config > parameters from there. Whoa there. I haven't looked at the RPMs you're distributing, but the htsearch CGI will timeout after a given interval (by default 5 minutes) via the alarm() call. Yes, the /dev/zero URL could be used for a Denial of Service attack in this fashion. Yes, it's a bug and a reason to upgrade. No, this is not an "endless" loop, unless you've removed that alarm() call. To quote from my previous message: At 3:46 PM -0500 10/7/01, Geoff Hutchison wrote: >remote user can force the CGI to stall until it times out Cheers, -- -- -Geoff Hutchison Williams Students Online http://wso.williams.edu/ (7275659) /Geoff Hutchison <ghutchis@wso.williams.edu>/(Ombruten)