Index: head/share/security/advisories/FreeBSD-SA-17:08.ptrace.asc
===================================================================
--- head/share/security/advisories/FreeBSD-SA-17:08.ptrace.asc (revision 51208)
+++ head/share/security/advisories/FreeBSD-SA-17:08.ptrace.asc (revision 51209)
@@ -1,140 +1,148 @@
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
=============================================================================
FreeBSD-SA-17:08.ptrace Security Advisory
The FreeBSD Project
Topic: Kernel data leak via ptrace(PT_LWPINFO)
Category: core
Module: ptrace
Announced: 2017-11-15
-Credits: John Baldwin
+Credits: Ilja van Sprundel
+ John Baldwin
Affects: All supported versions of FreeBSD.
Corrected: 2017-11-10 12:28:43 UTC (stable/11, 11.1-STABLE)
2017-11-15 22:39:41 UTC (releng/11.1, 11.1-RELEASE-p4)
2017-11-15 22:40:15 UTC (releng/11.0, 11.0-RELEASE-p15)
2017-11-10 12:31:58 UTC (stable/10, 10.4-STABLE)
2017-11-15 22:40:32 UTC (releng/10.4, 10.4-RELEASE-p3)
2017-11-15 22:40:46 UTC (releng/10.3, 10.3-RELEASE-p24)
CVE Name: CVE-2017-1086
For general information regarding FreeBSD Security Advisories,
including descriptions of the fields above, security branches, and the
following sections, please visit .
+0. Revision history
+
+v1.0 2017-11-15 Initial release.
+v1.1 2017-11-20 Corrected credit. Ilja van Sprundel first reported this
+ issue to the project, but wasn't cited. The FreeBSD
+ Security Team apologizes to Ilja for this oversight.
+
I. Background
The ptrace(2) syscall provides the facility for a debugger to control the
execution of the target process and to obtain necessary status information
about it. The struct ptrace_lwpinfo structure is reported by one of the
ptrace(2) subcommand and contains a lot of the information about the stopped
thread (light-weight process or LWP, thus the name).
II. Problem Description
Not all information in the struct ptrace_lwpinfo is relevant for the state
of any thread, and the kernel does not fill the irrelevant bytes or short
strings. Since the structure filled by the kernel is allocated on the
kernel stack and copied to userspace, a leak of information of the kernel
stack of the thread is possible from the debugger.
III. Impact
Some bytes from the kernel stack of the thread using ptrace(PT_LWPINFO)
call can be observed in userspace.
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.
Afterward, 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
Afterward, 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-17:08/ptrace.patch
# fetch https://security.FreeBSD.org/patches/SA-17:08/ptrace.patch.asc
# gpg --verify ptrace.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
and reboot the
system.
VI. Correction details
The following list contains the correction revision numbers for each
affected branch.
Branch/path Revision
- -------------------------------------------------------------------------
stable/10/ r325643
releng/10.3/ r325871
releng/10.4/ r325870
stable/11/ r325642
releng/11.0/ r325869
releng/11.1/ r325868
- -------------------------------------------------------------------------
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:
VII. References
The latest revision of this advisory is available at
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Index: head/share/security/advisories/FreeBSD-SA-17:10.kldstat.asc
===================================================================
--- head/share/security/advisories/FreeBSD-SA-17:10.kldstat.asc (revision 51208)
+++ head/share/security/advisories/FreeBSD-SA-17:10.kldstat.asc (revision 51209)
@@ -1,136 +1,144 @@
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
=============================================================================
FreeBSD-SA-17:10.kldstat Security Advisory
The FreeBSD Project
Topic: Information leak in kldstat(2)
Category: core
Module: kernel
Announced: 2017-11-15
-Credits: TJ Corley
+Credits: Ilja van Sprundel
+ TJ Corley
Affects: All supported versions of FreeBSD.
Corrected: 2017-11-15 22:34:15 UTC (stable/11, 11.1-STABLE)
2017-11-15 22:49:47 UTC (releng/11.1, 11.1-RELEASE-p4)
2017-11-15 22:50:20 UTC (releng/11.0, 11.0-RELEASE-p15)
2017-11-15 22:35:16 UTC (stable/10, 10.4-STABLE)
2017-11-15 22:50:47 UTC (releng/10.4, 10.4-RELEASE-p3)
2017-11-15 22:51:08 UTC (releng/10.3, 10.3-RELEASE-p24)
CVE Name: CVE-2017-1088
For general information regarding FreeBSD Security Advisories,
including descriptions of the fields above, security branches, and the
following sections, please visit .
+0. Revision history
+
+v1.0 2017-11-15 Initial release.
+v1.1 2017-11-20 Corrected credit. Ilja van Sprundel first reported the
+ issue to the project, but wasn't cited. The FreeBSD
+ Security Team apologizes to Ilja for this oversight.
+
I. Background
The kldstat(2) syscall provides information about loaded kld files. The
syscall takes a userland argument of struct kld_file_stat which is then
filled with data about the kld file requested.
II. Problem Description
The kernel does not properly clear the memory of the kld_file_stat
structure before filling the data. Since the structure filled by the
kernel is allocated on the kernel stack and copied to userspace, a leak
of information from the kernel stack is possible.
III. Impact
Some bytes from the kernel stack can be observed in userspace.
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.
Afterward, 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
Afterward, 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-17:10/kldstat.patch
# fetch https://security.FreeBSD.org/patches/SA-17:10/kldstat.patch.asc
# gpg --verify kldstat.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
and reboot the
system.
VI. Correction details
The following list contains the correction revision numbers for each
affected branch.
Branch/path Revision
- -------------------------------------------------------------------------
stable/10/ r325867
releng/10.3/ r325878
releng/10.4/ r325877
stable/11/ r325866
releng/11.0/ r325876
releng/11.1/ r325875
- -------------------------------------------------------------------------
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:
VII. References
The latest revision of this advisory is available at
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