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Xin LI 2015-08-25 21:09:45 +00:00
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Notes: svn2git 2020-12-08 03:00:23 +00:00 
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=============================================================================
FreeBSD-EN-15:14.ixgbe Errata Notice
The FreeBSD Project
Topic: Disable ixgbe(4) flow-director support
Category: core
Module: ixgbe
Announced: 2015-08-25
Credits: Marc De La Gueronniere (Verisign, Inc.)
Affects: FreeBSD 10.1
Corrected: 2014-10-11 22:10:39 UTC (stable/10, 10.1-STABLE)
2015-08-25 20:48:58 UTC (releng/10.1, 10.1-RELEASE-p19)
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
Flow director is an Intel technology to steer incoming packets in application
aware fashion.
II. Problem Description
Flow director support is not completely/correctly implemented in FreeBSD at
this time.
III. Impact
Enabling flow director support may cause traffic to land on a wrong RX queue
of the NIC, resulting in bad or sub-optimal performance on the receive side.
IV. Workaround
No workaround is available, but systems that do not have Intel(R) 82559
series 10Gb Ethernet Controllers are not affected.
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-15:14/ixgbe.patch
# fetch https://security.FreeBSD.org/patches/EN-15:14/ixgbe.patch.asc
# gpg --verify ixgbe.patch.asc
b) Apply the patch. Execute the following commands as root:
# cd /usr/src
# patch < /path/to/patch
c) Recompile your kernel as described in
<URL:https://www.FreeBSD.org/handbook/kernelconfig.html> and reboot the
system.
VI. Correction details
The following list contains the correction revision numbers for each
affected branch.
Branch/path Revision
- -------------------------------------------------------------------------
stable/10/ r272967
releng/10.1/ r287146
- -------------------------------------------------------------------------
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
The latest revision of this Errata Notice is available at
https://security.FreeBSD.org/advisories/FreeBSD-EN-15:14.ixgbe.asc
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=============================================================================
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
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=============================================================================
FreeBSD-SA-15:21.amd64 Security Advisory
The FreeBSD Project
Topic: Local privilege escalation in IRET handler
Category: core
Module: sys_amd64
Announced: 2015-08-25
Credits: Konstantin Belousov, Andrew Lutomirski
Affects: FreeBSD 9.3 and FreeBSD 10.1
Corrected: 2015-03-31 00:59:30 UTC (stable/10, 10.1-STABLE)
2015-08-25 20:48:58 UTC (releng/10.1, 10.1-RELEASE-p19)
2015-03-31 01:08:51 UTC (stable/9, 9.3-STABLE)
2015-08-25 20:49:05 UTC (releng/9.3, 9.3-RELEASE-p24)
CVE Name: CVE-2015-5675
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
FreeBSD/amd64 is commonly used on 64bit systems with AMD and Intel
CPU's.
The GS segment CPU register is used by both user processes and the
kernel to conveniently access state data: 32-bit user processes use the
register to manage per-thread data, while the kernel uses it to access
per-processor data.
The return from interrupt (IRET) instruction returns program control
from an interrupt handler to the interrupted context.
II. Problem Description
If the kernel-mode IRET instruction generates an #SS or #NP exception,
but the exception handler does not properly ensure that the right GS
register base for kernel is reloaded, the userland GS segment may be
used in the context of the kernel exception handler.
III. Impact
By causing an IRET with #SS or #NP exceptions, a local attacker can
cause the kernel to use an arbitrary GS base, which may allow escalated
privileges or panic the system.
IV. Workaround
No workaround is available.
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,
and reboot the system.
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
And reboot the system.
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.
# fetch https://security.FreeBSD.org/patches/SA-15:21/amd64.patch
# fetch https://security.FreeBSD.org/patches/SA-15:21/amd64.patch.asc
# gpg --verify amd64.patch.asc
b) Apply the patch. Execute the following commands as root:
# cd /usr/src
# patch < /path/to/patch
c) Recompile your kernel as described in
<URL:https://www.FreeBSD.org/handbook/kernelconfig.html> and reboot the
system.
VI. Correction details
The following list contains the correction revision numbers for each
affected branch.
Branch/path Revision
- -------------------------------------------------------------------------
stable/9/ r280877
releng/9.3/ r287147
stable/10/ r280875
releng/10.1/ r287146
- -------------------------------------------------------------------------
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-2015-5675>
The latest revision of this advisory is available at
<URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-15:21.amd64.asc>
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=============================================================================
FreeBSD-SA-15:22.openssh Security Advisory
The FreeBSD Project
Topic: OpenSSH multiple vulnerabilities
Category: contrib
Module: openssh
Announced: 2015-08-25
Affects: All supported versions of FreeBSD.
Corrected: 2015-08-25 20:48:44 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)
2015-08-25 20:48:44 UTC (stable/9, 9.3-STABLE)
2015-08-25 20:49:05 UTC (releng/9.3, 9.3-RELEASE-p24)
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
OpenSSH is an implementation of the SSH protocol suite, providing an
encrypted and authenticated transport for a variety of services,
including remote shell access.
The PAM (Pluggable Authentication Modules) library provides a flexible
framework for user authentication and session setup / teardown.
The default FreeBSD OpenSSH configuration has PAM interactive
authentication enabled.
Privilege separation is a technique in which a program is divided into
multiple cooperating processes, each with a different task, where each
process is limited to the specific privileges required to perform that
specific task, while the privileged parent process acts as an arbiter.
II. Problem Description
A programming error in the privileged monitor process of the sshd(8)
service may allow the username of an already-authenticated user to be
overwritten by the unprivileged child process.
A use-after-free error in the privileged monitor process of he sshd(8)
service may be deterministically triggered by the actions of a
compromised unprivileged child process.
A use-after-free error in the session multiplexing code in the sshd(8)
service may result in unintended termination of the connection.
III. Impact
The first bug may allow a remote attacker who a) has already succeeded
by other means in compromising the unprivileged pre-authentication
child process and b) has valid credentials to one user on the target
system to impersonate a different user.
The second bug may allow a remote attacker who has already succeeded
by other means in compromising the unprivileged pre-authentication
child process to bypass PAM authentication entirely.
The third bug is not exploitable, but can cause premature termination
of a multiplexed ssh connection.
IV. Workaround
No workaround is available, but systems where ssh(1) and sshd(8) are
not used 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.
The sshd(8) service has to be restarted after the update. A reboot
is recommended but not required.
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
The sshd(8) service has to be restarted after the update. A reboot
is recommended but not required.
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.
# fetch https://security.FreeBSD.org/patches/SA-15:22/openssh.patch
# fetch https://security.FreeBSD.org/patches/SA-15:22/openssh.patch.asc
# gpg --verify openssh.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 sshd(8) daemon, or reboot the system.
VI. Correction details
The following list contains the correction revision numbers for each
affected branch.
Branch/path Revision
- -------------------------------------------------------------------------
stable/9/ r287144
releng/9.3/ r287147
stable/10/ r287144
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
The latest revision of this advisory is available at
<URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-15:22.openssh.asc>
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