132 lines
4.9 KiB
Text
132 lines
4.9 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
|
|
Hash: SHA512
|
|
|
|
=============================================================================
|
|
FreeBSD-EN-15:15.pkg Errata Notice
|
|
The FreeBSD Project
|
|
|
|
Topic: Insufficient check of unsupported pkg(7) signature methods
|
|
|
|
Category: core
|
|
Module: pkg
|
|
Announced: 2015-08-25
|
|
Credits: Fabian Keil
|
|
Affects: All supported versions of FreeBSD.
|
|
Corrected: 2015-08-19 18:32:36 UTC (stable/10, 10.2-STABLE)
|
|
2015-08-25 20:48:51 UTC (releng/10.2, 10.2-RC3-p2)
|
|
2015-08-25 20:48:51 UTC (releng/10.2, 10.2-RELEASE-p2)
|
|
2015-08-25 20:48:58 UTC (releng/10.1, 10.1-RELEASE-p19)
|
|
2015-08-19 18:33:25 UTC (stable/9, 9.3-STABLE)
|
|
2015-08-25 20:49:05 UTC (releng/9.3, 9.3-RELEASE-p24)
|
|
CVE Name: CVE-2015-5676
|
|
|
|
For general information regarding FreeBSD Errata Notices and Security
|
|
Advisories, including descriptions of the fields above, security
|
|
branches, and the following sections, please visit
|
|
<URL:https://security.freebsd.org/>.
|
|
|
|
I. Background
|
|
|
|
The pkg(8) utility is the package management tool for FreeBSD. The base
|
|
system includes a pkg(7) bootstrap utility used to install the latest pkg(8)
|
|
utility.
|
|
|
|
II. Problem Description
|
|
|
|
When signature_type specified in pkg.conf(5) is set to an unsupported method,
|
|
the pkg(7) bootstrap utility would behave as if signature_type is set to
|
|
"none".
|
|
|
|
III. Impact
|
|
|
|
MITM attackers may be able to use this vulnerability and bypass validation,
|
|
installing their own version of pkg(8).
|
|
|
|
IV. Workaround
|
|
|
|
No workaround is available, but the default FreeBSD configuration is not
|
|
affected because it uses "fingerprint" method.
|
|
|
|
V. Solution
|
|
|
|
Perform one of the following:
|
|
|
|
1) Upgrade your system to a supported FreeBSD stable or release / security
|
|
branch (releng) dated after the correction date.
|
|
|
|
2) To update your present 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 present 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.
|
|
|
|
# fetch https://security.FreeBSD.org/patches/EN-15:15/pkg.patch
|
|
# fetch https://security.FreeBSD.org/patches/EN-15:15/pkg.patch.asc
|
|
# gpg --verify pkg.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>.
|
|
|
|
VI. Correction details
|
|
|
|
The following list contains the correction revision numbers for each
|
|
affected branch.
|
|
|
|
Branch/path Revision
|
|
- -------------------------------------------------------------------------
|
|
stable/9/ r286936
|
|
releng/9.3/ r287147
|
|
stable/10/ r286935
|
|
releng/10.1/ r287146
|
|
releng/10.2/ r287145
|
|
- -------------------------------------------------------------------------
|
|
|
|
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://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5676>
|
|
|
|
The latest revision of this Errata Notice is available at
|
|
https://security.FreeBSD.org/advisories/FreeBSD-EN-15:15.pkg.asc
|
|
|
|
-----BEGIN PGP SIGNATURE-----
|
|
Version: GnuPG v2.1.7 (FreeBSD)
|
|
|
|
iQIcBAEBCgAGBQJV3NfOAAoJEO1n7NZdz2rnzHwP/30xvOZqHSRYMykrkQKcIVH7
|
|
Vhp0lp1z7KaDBq7xD0m08i2WSr0/pSaBU+At141iSKwvCPS0Szx307kZBO9a8gxw
|
|
j7s6Z15qychKKGukJ5tJtKX4Q3mqAtjBoCC8wmwmJ/YNmr4HrZRL2vFp7nqAiyhl
|
|
ntTcSuwEElBoalufeMHWd46eguRO/r9D8uWw+O7a+lLeJO9ThjnNZXOPyMfUE3Yh
|
|
QoFpVcVdf+j6gIGUuPwNsfy4e6hBNvD0T47+PTBECTykiC1eoX+VXqf8PxKKWSOJ
|
|
50sKgXOtRy55dMtWbXhu5zjq4jzWFWtBPIRHM5SH/7V898S7zMerh81bsczBUqEA
|
|
aBu1XJS1fZHlXKlav6/m/G1Wo4QgscBUsV6PhsFNpFmvAdEW2qjnH887FBm7I/Fv
|
|
a3wvxMmQX1ABPbavFCUZmfS4khLFITYD77XLo8ciu/fyAz/X9n9p1F2EsbL8djis
|
|
TcTuyUVv3YXeq+gJ9OcOH4CFsYSNlKEYiAd86/9DBnsiVrQJqNzqx+roHjL7ZXg6
|
|
AA/pqHmOEBq01idYh7PadOf+B5cU5A1CFMhjfpF1qe1yeuFFM30U7ugxjgV4w85O
|
|
UFotAbyDlftUzeYYTQv2bK6oXzqtVagkhB/xXfQzPK9E3AnysfHA/bLysop7AMyZ
|
|
CHeFaGA84VB1k9Ky5nSv
|
|
=a+Ek
|
|
-----END PGP SIGNATURE-----
|