FreeBSD Security Advisory FreeBSD-SA-20:06.if_ixl_ioctl

classic Classic list List threaded Threaded
1 message Options
Reply | Threaded
Open this post in threaded view
|

FreeBSD Security Advisory FreeBSD-SA-20:06.if_ixl_ioctl

FreeBSD Security Advisories
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

=============================================================================
FreeBSD-SA-20:06.if_ixl_ioctl                               Security Advisory
                                                          The FreeBSD Project

Topic:          Insufficient ixl(4) ioctl(2) privilege checking

Category:       core
Module:         ixl(4)
Announced:      2020-03-19
Credits:        Ilja Van Sprundel
Affects:        All supported versions of FreeBSD.
Corrected:      2020-01-10 18:31:59 UTC (stable/12, 12.1-STABLE)
                2020-03-19 16:49:32 UTC (releng/12.1, 12.1-RELEASE-p3)
CVE Name:       CVE-2019-15877

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

The primary interface used for network driver configuration is ioctl(2).
Several ioctl(2) commands are reserved for driver-specific purposes.  For
instance, a driver may use one of these ioctls to implement an interface for
updating device firmware.

II.  Problem Description

The driver-specific ioctl(2) command handlers in ixl(4) failed to check
whether the caller has sufficient privileges to perform the corresponding
operation.

III. Impact

The ixl(4) handler permits unprivileged users to trigger updates to the
device's non-volatile memory (NVM).

IV.  Workaround

No workaround is available.  Systems that do not contain devices driven by
ixl(4) are unaffected.

V.   Solution

Upgrade your vulnerable system to a supported FreeBSD stable or
release / security branch (releng) dated after the correction date,
and reboot.

Perform one of the following:

1) 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
# shutdown -r +10min "Rebooting for a security update"

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-20:06/if_ixl_ioctl.patch
# fetch https://security.FreeBSD.org/patches/SA-20:06/if_ixl_ioctl.patch.asc
# gpg --verify if_ixl_ioctl.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/12/                                                        r356606
releng/12.1/                                                      r359140
- -------------------------------------------------------------------------

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-2019-15877>

The latest revision of this advisory is available at
<URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-20:06.if_ixl_ioctl.asc>
-----BEGIN PGP SIGNATURE-----
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=MmYl
-----END PGP SIGNATURE-----
_______________________________________________
[hidden email] mailing list
https://lists.freebsd.org/mailman/listinfo/freebsd-security-notifications
To unsubscribe, send any mail to "[hidden email]"