3571e53040
patches for easier mirroring, to eliminate a special copy, to make www.freebsd.org/security a full copy of security.freebsd.org and be eventually be the same. For now files are just sitting there. The symlinks are missing. Discussed on: www (repository location) Discussed with: simon (so)
155 lines
6.4 KiB
Text
155 lines
6.4 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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Hash: SHA1
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=============================================================================
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FreeBSD-SA-08:12.ftpd Security Advisory
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The FreeBSD Project
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Topic: Cross-site request forgery in ftpd(8)
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Category: core
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Module: ftpd
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Announced: 2008-12-23
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Credits: Maksymilian Arciemowicz
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Affects: All supported versions of FreeBSD.
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Corrected: 2008-12-23 01:23:09 UTC (RELENG_7, 7.1-PRERELEASE)
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2008-12-23 01:23:09 UTC (RELENG_7_1, 7.1-RC2)
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2008-12-23 01:23:09 UTC (RELENG_7_0, 7.0-RELEASE-p7)
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2008-12-23 01:23:09 UTC (RELENG_6, 6.4-STABLE)
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2008-12-23 01:23:09 UTC (RELENG_6_4, 6.4-RELEASE-p1)
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2008-12-23 01:23:09 UTC (RELENG_6_3, 6.3-RELEASE-p7)
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CVE Name: CVE-2008-4247
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For general information regarding FreeBSD Security Advisories,
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including descriptions of the fields above, security branches, and the
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following sections, please visit <URL:http://security.FreeBSD.org/>.
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I. Background
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ftpd(8) is a general-purpose implementation of File Transfer Protocol (FTP)
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server that is shipped with the FreeBSD base system. It is not enabled
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in default installations but can be enabled as either an inetd(8) server,
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or a standard-alone server.
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A cross-site request forgery attack is a type of malicious exploit that is
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mainly targeted to a web browser, by tricking a user trusted by the site
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into visiting a specially crafted URL, which in turn executes a command
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which performs some privileged operations on behalf of the trusted user
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on the victim site.
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II. Problem Description
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The ftpd(8) server splits long commands into several requests. This
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may result in the server executing a command which is hidden inside
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another very long command.
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III. Impact
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This could, with a specifically crafted command, be used in a
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cross-site request forgery attack.
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FreeBSD systems running ftpd(8) server could act as a point of privilege
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escalation in an attack against users using web browser to access trusted
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FTP sites.
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IV. Workaround
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No workaround is available, but systems not running FTP servers are
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not vulnerable. Systems not running the FreeBSD ftp(8) server are not
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affected, but users of other ftp daemons are advised to take care
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since several other ftp daemons are known to have related bugs.
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V. Solution
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Perform one of the following:
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1) Upgrade your vulnerable system to 6-STABLE, or 7-STABLE, or to the
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RELENG_7_1, RELENG_7_0, RELENG_6_4, or RELENG_6_3 security branch
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dated after the correction date.
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2) To patch your present system:
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The following patches have been verified to apply to FreeBSD 6.3, 6.4,
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7.0, and 7.1 systems.
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a) Download the relevant patch from the location below, and verify the
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detached PGP signature using your PGP utility.
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# fetch http://security.FreeBSD.org/patches/SA-08:12/ftpd.patch
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# fetch http://security.FreeBSD.org/patches/SA-08:12/ftpd.patch.asc
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b) Execute the following commands as root:
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# cd /usr/src
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# patch < /path/to/patch
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# cd /usr/src/libexec/ftpd
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# make obj && make depend && make && make install
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VI. Correction details
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The following list contains the revision numbers of each file that was
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corrected in FreeBSD.
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CVS:
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Branch Revision
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Path
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- -------------------------------------------------------------------------
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RELENG_6
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src/libexec/ftpd/ftpcmd.y 1.64.2.3
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src/libexec/ftpd/extern.h 1.19.14.1
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src/libexec/ftpd/ftpd.c 1.206.2.4
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RELENG_6_4
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src/UPDATING 1.416.2.40.2.4
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src/sys/conf/newvers.sh 1.69.2.18.2.7
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src/libexec/ftpd/ftpcmd.y 1.64.2.2.4.2
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src/libexec/ftpd/extern.h 1.19.30.2
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src/libexec/ftpd/ftpd.c 1.206.2.3.4.2
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RELENG_6_3
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src/UPDATING 1.416.2.37.2.12
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src/sys/conf/newvers.sh 1.69.2.15.2.11
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src/libexec/ftpd/ftpcmd.y 1.64.2.2.2.1
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src/libexec/ftpd/extern.h 1.19.26.1
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src/libexec/ftpd/ftpd.c 1.206.2.3.2.1
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RELENG_7
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src/libexec/ftpd/ftpcmd.y 1.66.2.1
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src/libexec/ftpd/extern.h 1.19.24.1
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src/libexec/ftpd/ftpd.c 1.212.2.1
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RELENG_7_1
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src/UPDATING 1.507.2.13.2.2
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src/libexec/ftpd/ftpcmd.y 1.66.6.2
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src/libexec/ftpd/extern.h 1.19.32.2
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src/libexec/ftpd/ftpd.c 1.212.6.2
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RELENG_7_0
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src/UPDATING 1.507.2.3.2.11
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src/sys/conf/newvers.sh 1.72.2.5.2.11
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src/libexec/ftpd/ftpcmd.y 1.66.4.1
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src/libexec/ftpd/extern.h 1.19.28.1
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src/libexec/ftpd/ftpd.c 1.212.4.1
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- -------------------------------------------------------------------------
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Subversion:
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Branch/path Revision
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- -------------------------------------------------------------------------
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stable/6/ r186405
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releng/6.4/ r186405
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releng/6.3/ r186405
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stable/7/ r186405
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releng/7.1/ r186405
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releng/7.0/ r186405
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- -------------------------------------------------------------------------
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VII. References
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4247
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The latest revision of this advisory is available at
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http://security.FreeBSD.org/advisories/FreeBSD-SA-08:12.ftpd.asc
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