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ESB-2016.0159 - [UNIX/Linux][Debian] fuse: Root compromise - Existing account

Date: 22 January 2016

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.0159
                           fuse security update
                              22 January 2016

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           fuse
Publisher:         Debian
Operating System:  Debian GNU/Linux 8
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Root Compromise -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-1233  

Original Bulletin: 
   http://www.debian.org/security/2016/dsa-3451

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Debian. It is recommended that administrators 
         running fuse check for an updated version of the software for their
         operating system.

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- - -------------------------------------------------------------------------
Debian Security Advisory DSA-3451-1                   security@debian.org
https://www.debian.org/security/                        Yves-Alexis Perez
January 20, 2016                      https://www.debian.org/security/faq
- - -------------------------------------------------------------------------

Package        : fuse
CVE ID         : CVE-2016-1233

Jann Horn discovered a vulnerability in the fuse (Filesystem in
Userspace) package in Debian. The fuse package ships an udev rules
adjusting permissions on the related /dev/cuse character device, making
it world writable.

This permits a local, unprivileged attacker to create an
arbitrarily-named character device in /dev and modify the memory of any
process that opens it and performs an ioctl on it.

This in turn might allow a local, unprivileged attacker to escalate to
root privileges.

For the oldstable distribution (wheezy), the fuse package is not affected.

For the stable distribution (jessie), this problem has been fixed in
version 2.9.3-15+deb8u2.

For the testing distribution (stretch), this problem has been fixed
in version 2.9.5-1.

For the unstable distribution (sid), this problem has been fixed in
version 2.9.5-1.

We recommend that you upgrade your fuse packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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This security bulletin is provided as a service to AusCERT's members.  As
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        http://www.auscert.org.au/render.html?cid=1980

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
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