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============================================================================= Message: 1 FreeBSD-SA-05:10.tcpdump Security Advisory The FreeBSD Project Topic: Infinite loops in tcpdump protocol decoding Category: contrib Module: tcpdump Announced: 2005-06-09 Credits: "Vade 79", Simon L. Nielsen Affects: FreeBSD 5.3-RELEASE and FreeBSD 5.4-RELEASE Corrected: 2005-06-08 21:26:27 UTC (RELENG_5, 5.4-STABLE) 2005-06-08 21:27:44 UTC (RELENG_5_4, 5.4-RELEASE-p2) 2005-06-08 21:29:15 UTC (RELENG_5_3, 5.3-RELEASE-p16) CVE Name: CAN-2005-1267, CAN-2005-1278, CAN-2005-1279, CAN-2005-1280 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 tcpdump utility is used to capture and examine network traffic. II. Problem Description Several tcpdump protocol decoders contain programming errors which can cause them to go into infinite loops. III. Impact An attacker can inject specially crafted packets into the network which, when processed by tcpdump, could lead to a denial-of-service. After the attack, tcpdump would no longer capture traffic, and would potentially use all available processor time. IV. Workaround No workaround is available. V. Solution Perform one of the following: 1) Upgrade your vulnerable system to 5-STABLE, or to the RELENG_5_4 or RELENG_5_3 security branch dated after the correction date. 2) To patch your present system: The following patches have been verified to apply to FreeBSD 5.3 and 5.4 systems. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CE.../tcpdump.patch # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CE...dump.patch.asc b) Execute the following commands as root: # cd /usr/src # patch < /path/to/patch # cd /usr/src/usr.sbin/tcpdump/tcpdump # 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_5 src/contrib/tcpdump/print-bgp.c 1.1.1.5.2.1 src/contrib/tcpdump/print-isoclns.c 1.12.2.1 src/contrib/tcpdump/print-ldp.c 1.1.1.1.2.1 src/contrib/tcpdump/print-rsvp.c 1.1.1.1.2.1 RELENG_5_4 src/UPDATING 1.342.2.24.2.11 src/sys/conf/newvers.sh 1.62.2.18.2.7 src/contrib/tcpdump/print-bgp.c 1.1.1.5.6.1 src/contrib/tcpdump/print-isoclns.c 1.12.6.1 src/contrib/tcpdump/print-ldp.c 1.1.1.1.6.1 src/contrib/tcpdump/print-rsvp.c 1.1.1.1.6.1 RELENG_5_3 src/UPDATING 1.342.2.13.2.19 src/sys/conf/newvers.sh 1.62.2.15.2.21 src/contrib/tcpdump/print-bgp.c 1.1.1.5.4.1 src/contrib/tcpdump/print-isoclns.c 1.12.4.1 src/contrib/tcpdump/print-ldp.c 1.1.1.1.4.1 src/contrib/tcpdump/print-rsvp.c 1.1.1.1.4.1 - ------------------------------------------------------------------------- VII. References http://cve.mitre.org/cgi-bin/cvename...=CAN-2005-1267 http://cve.mitre.org/cgi-bin/cvename...=CAN-2005-1278 http://cve.mitre.org/cgi-bin/cvename...=CAN-2005-1279 http://cve.mitre.org/cgi-bin/cvename...=CAN-2005-1280 http://marc.theaimsgroup.com/?l=bugt...11454406222040 http://marc.theaimsgroup.com/?l=bugt...11454461300644 ============================================================================= Message: 2 FreeBSD-SA-05:11.gzip Security Advisory The FreeBSD Project Topic: gzip directory traversal and permission race vulnerabilities Category: contrib Module: gzip Announced: 2005-06-09 Credits: Ulf Harnhammar, Imran Ghory Affects: All FreeBSD releases Corrected: 2005-06-08 21:26:27 UTC (RELENG_5, 5.4-STABLE) 2005-06-08 21:27:44 UTC (RELENG_5_4, 5.4-RELEASE-p2) 2005-06-08 21:29:15 UTC (RELENG_5_3, 5.3-RELEASE-p16) 2005-06-08 21:29:53 UTC (RELENG_4, 4.11-STABLE) 2005-06-08 21:30:43 UTC (RELENG_4_11, 4.11-RELEASE-p10) 2005-06-08 21:31:16 UTC (RELENG_4_10, 4.10-RELEASE-p15) CVE Name: CAN-2005-0988, CAN-2005-1228 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 gzip is a file compression utility. II. Problem Description Two problems related to extraction of files exist in gzip: The first problem is that gzip does not properly sanitize filenames containing "/" when uncompressing files using the -N command line option. The second problem is that gzip does not set permissions on newly extracted files until after the file has been created and the file descriptor has been closed. III. Impact The first problem can allow an attacker to overwrite arbitrary local files when uncompressing a file using the -N command line option. The second problem can allow a local attacker to change the permissions of arbitrary local files, on the same partition as the one the user is uncompressing a file on, by removing the file the user is uncompressing and replacing it with a hardlink before the uncompress operation is finished. IV. Workaround Do not use the -N command line option on untrusted files and do not uncompress files in directories where untrusted users have write access. V. Solution Perform one of the following: 1) Upgrade your vulnerable system to 4-STABLE or 5-STABLE, or to the RELENG_5_4, RELENG_5_3, RELENG_4_11, or RELENG_4_10 security branch dated after the correction date. 2) To patch your present system: The following patches have been verified to apply to FreeBSD 4.10, 4.11, 5.3, and 5.4 systems. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CE...:11/gzip.patch # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CE...gzip.patch.asc b) Execute the following commands as root: # cd /usr/src # patch < /path/to/patch # cd /usr/src/gnu/usr.bin/gzip # 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 src/gnu/usr.bin/gzip/gzip.c 1.10.2.1 RELENG_4_11 src/UPDATING 1.73.2.91.2.11 src/sys/conf/newvers.sh 1.44.2.39.2.14 src/gnu/usr.bin/gzip/gzip.c 1.10.26.1 RELENG_4_10 src/UPDATING 1.73.2.90.2.16 src/sys/conf/newvers.sh 1.44.2.34.2.17 src/gnu/usr.bin/gzip/gzip.c 1.10.24.1 RELENG_5 src/gnu/usr.bin/gzip/gzip.c 1.11.2.1 RELENG_5_4 src/UPDATING 1.342.2.24.2.11 src/sys/conf/newvers.sh 1.62.2.18.2.7 src/gnu/usr.bin/gzip/gzip.c 1.11.6.1 RELENG_5_3 src/UPDATING 1.342.2.13.2.19 src/sys/conf/newvers.sh 1.62.2.15.2.21 src/gnu/usr.bin/gzip/gzip.c 1.11.4.1 ------------------------------------------------------------------------- VII. References http://cve.mitre.org/cgi-bin/cvename...=CAN-2005-0988 http://cve.mitre.org/cgi-bin/cvename...=CAN-2005-1228 http://marc.theaimsgroup.com/?l=bugt...11271860708210 http://marc.theaimsgroup.com/?l=bugt...11402732406477