Add two latest advisories:
Fix Denial of Service vulnerability in named(8). [13:07] Fix a bug that allows remote client bypass the normal access checks when when -network or -host restrictions are used at the same time with -mapall. [13:08]
This commit is contained in:
Xin LI
parent
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commit
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Notes:
svn2git
2020-12-08 03:00:23 +00:00
svn path=/head/; revision=42453
7 changed files with 312 additions and 0 deletions
121
share/security/advisories/FreeBSD-SA-13:07.bind.asc
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121
share/security/advisories/FreeBSD-SA-13:07.bind.asc
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@ -0,0 +1,121 @@
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-----BEGIN PGP SIGNED MESSAGE-----
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Hash: SHA1
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=============================================================================
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FreeBSD-SA-13:07.bind Security Advisory
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The FreeBSD Project
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Topic: BIND remote denial of service
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Category: contrib
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Module: bind
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Announced: 2013-07-26
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Credits: Maxim Shudrak and the HP Zero Day Initiative, ISC
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Affects: FreeBSD 8.4-RELEASE and FreeBSD 9.x
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Corrected: 2013-07-26 22:53:17 UTC (stable/8, 8.4-STABLE)
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2013-07-26 22:40:17 UTC (releng/8.4, 8.4-RELEASE-p2)
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2013-07-26 22:43:09 UTC (stable/9, 9.2-BETA2)
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2013-07-26 22:40:23 UTC (releng/9.1, 9.1-RELEASE-p5)
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CVE Name: CVE-2013-4854
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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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BIND 9 is an implementation of the Domain Name System (DNS) protocols.
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The named(8) daemon is an Internet Domain Name Server. The libdns
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library is a library of DNS protocol support functions.
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II. Problem Description
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Due to a software defect a specially crafted query which includes
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malformed rdata, could cause named(8) to crash with an assertion
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failure and rejecting the malformed query. This issue affects both
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recursive and authoritative-only nameservers.
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III. Impact
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An attacker who can send a specially crafted query could cause named(8)
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to crash, resulting in a denial of service.
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IV. Workaround
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No workaround is available, but systems not running the named(8) service
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and not using the base system DNS utilities are not affected.
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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 a supported FreeBSD stable or
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release / security branch (releng) dated after the correction date.
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2) To update your vulnerable system via a source code patch:
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The following patches have been verified to apply to the applicable
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FreeBSD release branches.
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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-13:07/bind.patch
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# fetch http://security.FreeBSD.org/patches/SA-13:07/bind.patch.asc
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# gpg --verify bind.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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Recompile the operating system using buildworld and installworld as
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described in <URL:http://www.FreeBSD.org/handbook/makeworld.html>.
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Restart the named daemon, or reboot the system.
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3) To update your vulnerable system via a binary patch:
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Systems running a RELEASE version of FreeBSD on the i386 or amd64
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platforms can be updated via the freebsd-update(8) utility:
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# freebsd-update fetch
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# freebsd-update install
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VI. Correction details
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The following list contains the correction revision numbers for each
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affected branch.
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Branch/path Revision
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- -------------------------------------------------------------------------
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stable/8/ r253696
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releng/8.4/ r253692
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stable/9/ r253695
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releng/9.1/ r253693
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- -------------------------------------------------------------------------
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To see which files were modified by a particular revision, run the
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following command, replacing XXXXXX with the revision number, on a
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machine with Subversion installed:
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# svn diff -cXXXXXX --summarize svn://svn.freebsd.org/base
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Or visit the following URL, replacing XXXXXX with the revision number:
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<URL:http://svnweb.freebsd.org/base?view=revision&revision=XXXXXX>
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VII. References
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https://kb.isc.org/article/AA-01015
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<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4854>
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The latest revision of this advisory is available at
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http://security.FreeBSD.org/advisories/FreeBSD-SA-13:07.bind.asc
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-----BEGIN PGP SIGNATURE-----
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iEYEARECAAYFAlHzPpMACgkQFdaIBMps37Jb2ACdFqaNTTBFiOCuz30MJ5s85UVd
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=RFf2
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-----END PGP SIGNATURE-----
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120
share/security/advisories/FreeBSD-SA-13:08.nfsserver.asc
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share/security/advisories/FreeBSD-SA-13:08.nfsserver.asc
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@ -0,0 +1,120 @@
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-----BEGIN PGP SIGNED MESSAGE-----
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Hash: SHA1
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=============================================================================
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FreeBSD-SA-13:08.nfsserver Security Advisory
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The FreeBSD Project
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Topic: Incorrect privilege validation in the NFS server
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Category: core
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Module: nfsserver
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Announced: 2013-07-26
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Credits: Rick Macklem, Christopher Key, Tim Zingelman
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Affects: FreeBSD 8.3, FreeBSD 9.0 and FreeBSD 9.1
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Corrected: 2012-12-28 14:06:49 UTC (stable/9, 9.2-BETA2)
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2013-07-26 22:40:23 UTC (releng/9.1, 9.1-RELEASE-p5)
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2013-01-06 01:11:45 UTC (stable/8, 8.3-STABLE)
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2013-07-26 22:40:29 UTC (releng/8.3, 8.3-RELEASE-p9)
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CVE Name: CVE-2013-4851
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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 Network File System (NFS) allows a host to export some or all of its
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file systems so that other hosts can access them over the network and mount
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them as if they were on local disks. FreeBSD includes both server and client
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implementations of NFS.
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II. Problem Description
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The kernel incorrectly uses client supplied credentials instead of the one
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configured in exports(5) when filling out the anonymous credential for a
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NFS export, when -network or -host restrictions are used at the same time.
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III. Impact
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The remote client may supply privileged credentials (e.g. the root user)
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when accessing a file under the NFS share, which will bypass the normal
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access checks.
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IV. Workaround
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Systems that do not provide the NFS service are not vulnerable. Systems that
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do provide the NFS service are only vulnerable when -mapall or -maproot is
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used in combination with network and/or host restrictions.
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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 a supported FreeBSD stable or
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release / security branch (releng) dated after the correction date.
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2) To update your vulnerable system via a source code patch:
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The following patches have been verified to apply to the applicable
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FreeBSD release branches.
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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-13:08/nfsserver.patch
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# fetch http://security.FreeBSD.org/patches/SA-13:08/nfsserver.patch.asc
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# gpg --verify nfsserver.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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3) To update your vulnerable system via a binary patch:
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Systems running a RELEASE version of FreeBSD on the i386 or amd64
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platforms can be updated via the freebsd-update(8) utility:
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# freebsd-update fetch
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# freebsd-update install
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VI. Correction details
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The following list contains the correction revision numbers for each
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affected branch.
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Branch/path Revision
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- -------------------------------------------------------------------------
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stable/8/ r245086
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releng/8.3/ r253694
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stable/9/ r244772
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releng/9.1/ r253693
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- -------------------------------------------------------------------------
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To see which files were modified by a particular revision, run the
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following command, replacing XXXXXX with the revision number, on a
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machine with Subversion installed:
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# svn diff -cXXXXXX --summarize svn://svn.freebsd.org/base
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Or visit the following URL, replacing XXXXXX with the revision number:
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<URL:http://svnweb.freebsd.org/base?view=revision&revision=XXXXXX>
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VII. References
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<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4851>
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The latest revision of this advisory is available at
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http://security.FreeBSD.org/advisories/FreeBSD-SA-13:08.nfsserver.asc
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-----BEGIN PGP SIGNATURE-----
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iEYEARECAAYFAlHzPrkACgkQFdaIBMps37I9YACfSu4orRhgOhol8vacW9kF3ZGP
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=xjf/
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-----END PGP SIGNATURE-----
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13
share/security/patches/SA-13:07/bind.patch
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13
share/security/patches/SA-13:07/bind.patch
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@ -0,0 +1,13 @@
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Index: contrib/bind9/lib/dns/rdata/generic/keydata_65533.c
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===================================================================
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--- contrib/bind9/lib/dns/rdata/generic/keydata_65533.c (revision 253461)
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+++ contrib/bind9/lib/dns/rdata/generic/keydata_65533.c (working copy)
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@@ -176,7 +176,7 @@
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UNUSED(options);
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isc_buffer_activeregion(source, &sr);
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- if (sr.length < 4)
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+ if (sr.length < 16)
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return (ISC_R_UNEXPECTEDEND);
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isc_buffer_forward(source, sr.length);
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6
share/security/patches/SA-13:07/bind.patch.asc
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6
share/security/patches/SA-13:07/bind.patch.asc
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@ -0,0 +1,6 @@
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-----BEGIN PGP SIGNATURE-----
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iEYEABECAAYFAlHzPqUACgkQFdaIBMps37IIPgCgioXGAf1PRyZ0mSeCktSzxFeY
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l+4An0YlRzZ8Xbt+CgxwIwyvGjLYpy9q
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=tbCD
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-----END PGP SIGNATURE-----
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13
share/security/patches/SA-13:08/nfsserver.patch
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share/security/patches/SA-13:08/nfsserver.patch
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Index: sys/kern/vfs_export.c
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===================================================================
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--- sys/kern/vfs_export.c (revision 253367)
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+++ sys/kern/vfs_export.c (working copy)
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@@ -208,7 +208,7 @@
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np->netc_anon = crget();
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np->netc_anon->cr_uid = argp->ex_anon.cr_uid;
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crsetgroups(np->netc_anon, argp->ex_anon.cr_ngroups,
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- np->netc_anon->cr_groups);
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+ argp->ex_anon.cr_groups);
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np->netc_anon->cr_prison = &prison0;
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prison_hold(np->netc_anon->cr_prison);
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np->netc_numsecflavors = argp->ex_numsecflavors;
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22
share/security/patches/SA-13:08/nfsserver.patch.asc
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22
share/security/patches/SA-13:08/nfsserver.patch.asc
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@ -0,0 +1,22 @@
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-----BEGIN PGP SIGNED MESSAGE-----
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Hash: SHA1
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Index: sys/kern/vfs_export.c
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===================================================================
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- --- sys/kern/vfs_export.c (revision 253367)
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+++ sys/kern/vfs_export.c (working copy)
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@@ -208,7 +208,7 @@
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np->netc_anon = crget();
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np->netc_anon->cr_uid = argp->ex_anon.cr_uid;
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crsetgroups(np->netc_anon, argp->ex_anon.cr_ngroups,
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- - np->netc_anon->cr_groups);
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+ argp->ex_anon.cr_groups);
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np->netc_anon->cr_prison = &prison0;
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prison_hold(np->netc_anon->cr_prison);
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np->netc_numsecflavors = argp->ex_numsecflavors;
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-----BEGIN PGP SIGNATURE-----
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iEYEARECAAYFAlHzPsQACgkQFdaIBMps37J36gCgglvXt5i1cg/+gvs4mHyJ+mrj
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=kdhf
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-----END PGP SIGNATURE-----
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@ -7,6 +7,23 @@
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<year>
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<year>
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<name>2013</name>
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<name>2013</name>
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<month>
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<name>7</name>
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<day>
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<name>26</name>
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<advisory>
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<name>FreeBSD-SA-13:07.bind</name>
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</advisory>
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<advisory>
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<name>FreeBSD-SA-13:08.nfsserver</name>
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</advisory>
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</day>
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</month>
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<month>
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<month>
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<name>6</name>
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<name>6</name>
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Loading…
Reference in a new issue