The OpenNET Project
 
Search (keywords):  SOFT ARTICLES TIPS & TRICKS SECURITY
LINKS NEWS MAN DOCUMENTATION


FreeBSD Security Advisory FreeBSD-SA-04:14.cvs


<< Previous INDEX Search src Set bookmark Go to bookmark Next >>
Date: Mon, 20 Sep 2004 13:50:32 GMT
From: FreeBSD Security Advisories <security-advisories@freebsd.org.>
To: Bugtraq <bugtraq@securityfocus.com.>
Subject: FreeBSD Security Advisory FreeBSD-SA-04:14.cvs

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1


FreeBSD-SA-04:14.cvs.asc Security Advisory The FreeBSD Project Topic: CVS Category: contrib Module: cvs Announced: 2004-09-19 Credits: Stefan Esser, Sebastian Krahmer, Derek Price iDEFENSE Affects: All FreeBSD versions Corrected: 2004-06-29 16:10:50 UTC (RELENG_4) 2004-09-19 22:26:22 UTC (RELENG_4_10, 4.10-RELEASE-p3) 2004-09-19 22:27:36 UTC (RELENG_4_9, 4.9-RELEASE-p12) 2004-09-19 22:28:14 UTC (RELENG_4_8, 4.8-RELEASE-p25) 2004-09-19 22:37:10 UTC (RELENG_5_2, 5.2.1-RELEASE-p10) CVE Name: CAN-2004-0414, CAN-2004-0416, CAN-2004-0417, CAN-2004-0418, CAN-2004-0778 FreeBSD only: NO For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit <URL:http://www.freebsd.org/security/>;. I. Background The Concurrent Versions System (CVS) is a version control system. It may be used to access a repository locally, or to access a `remote repository' using a number of different methods. When accessing a remote repository, the target machine runs the CVS server to fulfill client requests. II. Problem Description A number of vulnerabilities were discovered in CVS by Stefan Esser, Sebastian Krahmer, and Derek Price. . Insufficient input validation while processing "Entry" lines. (CAN-2004-0414) . A double-free resulting from erroneous state handling while processing "Argumentx" commands. (CAN-2004-0416) . Integer overflow while processing "Max-dotdot" commands. (CAN-2004-0417) . Erroneous handling of empty entries handled while processing "Notify" commands. (CAN-2004-0418) . A format string bug while processing CVS wrappers. . Single-byte buffer underflows while processing configuration files from CVSROOT. . Various other integer overflows. Additionally, iDEFENSE reports an undocumented command-line flag used in debugging does not perform input validation on the given path names. III. Impact CVS servers ("cvs server" or :pserver: modes) are affected by these vulnerabilities. They vary in impact but include information disclosure (the iDEFENSE-reported bug), denial-of-service (CAN-2004-0414, CAN-2004-0416, CAN-2004-0417 and other bugs), or possibly arbitrary code execution (CAN-2004-0418). In very special situations where the attacker may somehow influence the contents of CVS configuration files in CVSROOT, additional attacks may be possible. IV. Workaround Disable the use of remote CVS repositories. V. Solution Do one of the following: 1) Upgrade your vulnerable system to the RELENG_4 stable branch, or to the RELENG_5_2, RELENG_4_10, RELENG_4_9, or RELENG_4_8 security branch dated after the correction date. OR 2) Patch your present system: The following patches have been verified to apply to FreeBSD 4.8, 4.9, 4.10 and 5.2.1 systems. Note that one *must* have previously applied the patches pertaining to FreeBSD-SA-04:10.cvs in order to use these patches. Note that FreeBSD 4.10-STABLE systems built from sources dated 2004-06-29 16:20:00 UTC or later include cvs 1.11.17, which has all of these issues fixed. These patches should not be applied to those systems. a) Download the relevant patches from the location below, and verify the detached PGP signature using your PGP utility. # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:14/cvs.patch # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:14/cvs.patch.asc b) Execute the following commands as root: # cd /usr/src # patch < /path/to/patch # cd /usr/src/gnu/usr.bin/cvs # make obj && make depend && make && make install VI. Correction details The following list contains the revision numbers of each file that was corrected in FreeBSD. Branch Revision Path - ------------------------------------------------------------------------- RELENG_4_10 src/UPDATING 1.73.2.90.2.4 src/sys/conf/newvers.sh 1.44.2.34.2.5 src/contrib/cvs/lib/xsize.h 1.1.1.1.6.1 src/contrib/cvs/src/commit.c 1.8.2.5.6.1 src/contrib/cvs/src/cvs.h 1.11.2.6.6.1 src/contrib/cvs/src/filesubr.c 1.6.2.4.6.1 src/contrib/cvs/src/history.c 1.1.1.6.2.4.6.1 src/contrib/cvs/src/modules.c 1.1.1.5.2.4.2.1 src/contrib/cvs/src/server.c 1.13.2.5.6.3 src/contrib/cvs/src/wrapper.c 1.1.1.7.2.3.6.1 src/gnu/usr.bin/cvs/lib/config.h.proto 1.16.2.1.6.1 RELENG_4_9 src/UPDATING 1.73.2.89.2.13 src/sys/conf/newvers.sh 1.44.2.32.2.13 src/contrib/cvs/lib/xsize.h 1.1.1.1.8.1 src/contrib/cvs/src/commit.c 1.8.2.5.4.1 src/contrib/cvs/src/cvs.h 1.11.2.6.4.1 src/contrib/cvs/src/filesubr.c 1.6.2.4.4.1 src/contrib/cvs/src/history.c 1.1.1.6.2.4.4.1 src/contrib/cvs/src/modules.c 1.1.1.5.2.3.4.2 src/contrib/cvs/src/server.c 1.13.2.5.4.3 src/contrib/cvs/src/wrapper.c 1.1.1.7.2.3.4.1 src/gnu/usr.bin/cvs/lib/config.h.proto 1.16.2.1.4.1 RELENG_4_8 src/UPDATING 1.73.2.80.2.28 src/sys/conf/newvers.sh 1.44.2.29.2.26 src/contrib/cvs/lib/xsize.h 1.1.1.1.10.1 src/contrib/cvs/src/commit.c 1.8.2.5.2.1 src/contrib/cvs/src/cvs.h 1.11.2.6.2.1 src/contrib/cvs/src/filesubr.c 1.6.2.4.2.1 src/contrib/cvs/src/history.c 1.1.1.6.2.4.2.1 src/contrib/cvs/src/modules.c 1.1.1.5.2.3.2.2 src/contrib/cvs/src/server.c 1.13.2.5.2.3 src/contrib/cvs/src/wrapper.c 1.1.1.7.2.3.2.1 src/gnu/usr.bin/cvs/lib/config.h.proto 1.16.2.1.2.1 RELENG_5_2 src/UPDATING 1.282.2.18 src/sys/conf/newvers.sh 1.56.2.17 src/contrib/cvs/lib/xsize.h 1.1.1.1.12.1 src/contrib/cvs/src/commit.c 1.13.4.1 src/contrib/cvs/src/cvs.h 1.17.4.1 src/contrib/cvs/src/filesubr.c 1.10.6.1 src/contrib/cvs/src/history.c 1.1.1.10.6.1 src/contrib/cvs/src/modules.c 1.1.1.8.6.3 src/contrib/cvs/src/server.c 1.19.4.4 src/contrib/cvs/src/wrapper.c 1.1.1.10.6.1 src/gnu/usr.bin/cvs/lib/config.h.proto 1.17.2.1 - ------------------------------------------------------------------------- VII. References <URL: http://security.e-matters.de/advisories/092004.html > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (FreeBSD) iD8DBQFBTterFdaIBMps37IRAlkjAJ9jZ40PME0gr8b6DyS+h6zVHCxGTgCfdJN/ JiKgPD2YDy378kBO3hYd8Ao= =qzxJ -----END PGP SIGNATURE-----

<< Previous INDEX Search src Set bookmark Go to bookmark Next >>



Партнёры:
PostgresPro
Inferno Solutions
Hosting by Hoster.ru
Хостинг:

Закладки на сайте
Проследить за страницей
Created 1996-2024 by Maxim Chirkov
Добавить, Поддержать, Вебмастеру