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)
146 lines
5.5 KiB
Text
146 lines
5.5 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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Hash: SHA1
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=============================================================================
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FreeBSD-SA-08:13.protosw Security Advisory
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The FreeBSD Project
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Topic: netgraph / bluetooth privilege escalation
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Category: core
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Module: sys_kern
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Announced: 2008-12-23
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Credits: Christer Oberg
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Affects: All FreeBSD releases
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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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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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The FreeBSD kernel provides support for a variety of different types of
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communications sockets, including IPv4, IPv6, ISDN, ATM, routing protocol,
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link-layer, netgraph(4), and bluetooth sockets. As an early form of
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object-oriented design, much of the functionality specific to different
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types of sockets is abstracted via function pointers.
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II. Problem Description
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Some function pointers for netgraph and bluetooth sockets are not
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properly initialized.
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III. Impact
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A local user can cause the FreeBSD kernel to execute arbitrary code.
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This could be used by an attacker directly; or it could be used to gain
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root privilege or to escape from a jail.
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IV. Workaround
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No workaround is available, but systems without local untrusted users
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are not vulnerable. Furthermore, systems are not vulnerable if they
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have neither the ng_socket nor ng_bluetooth kernel modules loaded or
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compiled into the kernel.
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Systems with the security.jail.socket_unixiproute_only sysctl set to
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1 (the default) are only vulnerable if they have local untrusted users
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outside of jails.
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If the command
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# kldstat -v | grep ng_
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produces no output, the system is not vulnerable.
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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_0, RELENG_6_4, or RELENG_6_3 security branch dated after the
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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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and 7.0 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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[FreeBSD 6.x]
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# fetch http://security.FreeBSD.org/patches/SA-08:13/protosw6x.patch
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# fetch http://security.FreeBSD.org/patches/SA-08:13/protosw6x.patch.asc
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[FreeBSD 7.x]
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# fetch http://security.FreeBSD.org/patches/SA-08:13/protosw.patch
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# fetch http://security.FreeBSD.org/patches/SA-08:13/protosw.patch.asc
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b) Apply the patch.
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# cd /usr/src
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# patch < /path/to/patch
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c) Recompile your kernel as described in
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<URL:http://www.FreeBSD.org/handbook/kernelconfig.html> and reboot the
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system.
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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/sys/kern/uipc_domain.c 1.44.2.4
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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/sys/kern/uipc_domain.c 1.44.2.3.6.2
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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/sys/kern/uipc_domain.c 1.44.2.3.4.1
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RELENG_7
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src/sys/kern/uipc_domain.c 1.51.2.2
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RELENG_7_1
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src/UPDATING 1.507.2.13.2.2
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src/sys/kern/uipc_domain.c 1.51.2.1.2.2
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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/sys/kern/uipc_domain.c 1.51.4.1
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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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The latest revision of this advisory is available at
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http://security.FreeBSD.org/advisories/FreeBSD-SA-08:13.protosw.asc
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