Add SA-14:30

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2014-12-17 08:29:53 +00:00 · 2014-12-17 08:29:53 +00:00 · 0cfc9585b8 · 2020-12-08 03:00:23 +00:00
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--- a/share/security/advisories/FreeBSD-SA-14:30.unbound.asc
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+-----BEGIN PGP SIGNED MESSAGE-----
+Hash: SHA512
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+=============================================================================
+FreeBSD-SA-14:30.unbound                                    Security Advisory
+                                                          The FreeBSD Project
+
+Topic:          unbound remote denial of service vulnerability
+
+Category:       contrib
+Module:         unbound
+Announced:      2014-12-17
+Affects:        FreeBSD 10.0-RELEASE and later
+Credits:        Florian Maury (ANSSI)
+Corrected:      2014-12-17 06:58:00 UTC (stable/10, 10.1-STABLE)
+                2014-12-17 06:59:47 UTC (releng/10.1, 10.1-RELEASE-p2)
+                2014-12-17 06:59:47 UTC (releng/10.0, 10.0-RELEASE-p14)
+CVE Name:       CVE-2014-8602
+
+For general information regarding FreeBSD Security Advisories,
+including descriptions of the fields above, security branches, and the
+following sections, please visit <URL:https://security.FreeBSD.org/>.
+
+I.   Background
+
+Unbound is a validating, recursive, and caching DNS resolver.
+
+II.  Problem Description
+
+By causing queries to be made against a maliciously-constructed zone or
+against a malicious DNS server, an attacker who is able to cause
+specific queries to be sent to a nameserver can trick unbound(8) resolver
+into following an endless series of delegations, which consumes a lot of
+resources.
+
+III. Impact
+
+Unbound will spend a lot of resources on this query, and this will impact
+unbound's CPU and network resources.  Unbound may therefore lose some
+ability or timelines for the service of customer queries (a denial of
+service).  Unbound will continue to respond normally for cached queries.
+
+IV.  Workaround
+
+No workaround is available, but hosts not running unbound(8) are not
+vulnerable.
+
+V.   Solution
+
+Perform one of the following:
+
+1) Upgrade your vulnerable system to a supported FreeBSD stable or
+release / security branch (releng) dated after the correction date.
+
+2) To update your vulnerable system via a binary patch:
+
+Systems running a RELEASE version of FreeBSD on the i386 or amd64
+platforms can be updated via the freebsd-update(8) utility:
+
+# freebsd-update fetch
+# freebsd-update install
+
+3) To update your vulnerable system via a source code patch:
+
+The following patches have been verified to apply to the applicable
+FreeBSD release branches.
+
+a) Download the relevant patch from the location below, and verify the
+detached PGP signature using your PGP utility.
+
+[FreeBSD 10.x]
+# fetch https://security.FreeBSD.org/patches/SA-14:30/unbound.patch
+# fetch https://security.FreeBSD.org/patches/SA-14:30/unbound.patch.asc
+# gpg --verify unbound.patch.asc
+
+b) Apply the patch.  Execute the following commands as root:
+
+# cd /usr/src
+# patch < /path/to/patch
+
+c) Recompile the operating system using buildworld and installworld as
+described in <URL:https://www.FreeBSD.org/handbook/makeworld.html>.
+
+Restart the unbound(8) daemons, or reboot the system.
+
+VI.  Correction details
+
+The following list contains the correction revision numbers for each
+affected branch.
+
+Branch/path                                                      Revision
+- -------------------------------------------------------------------------
+stable/10/                                                        r275853
+releng/10.0/                                                      r275854
+releng/10.1/                                                      r275854
+- -------------------------------------------------------------------------
+
+To see which files were modified by a particular revision, run the
+following command, replacing NNNNNN with the revision number, on a
+machine with Subversion installed:
+
+# svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base
+
+Or visit the following URL, replacing NNNNNN with the revision number:
+
+<URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>
+
+VII. References
+
+<URL:https://unbound.net/downloads/CVE-2014-8602.txt>
+
+<URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8602>
+
+The latest revision of this advisory is available at
+<URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-14:30.unbound.asc>
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