RedHat: RHSA-2017-3277:01 Moderate: tcmu-runner security update
Summary
The tcmu-runner packages provide a service that handles the complexity of
the LIO kernel target's userspace passthrough interface (TCMU). It presents
a C plugin API for extension modules that handle SCSI requests in ways not
possible or suitable to be handled by LIO's in-kernel backstores.
Security Fix(es):
* A flaw was found in the implementation of CheckConfig method in
handler_glfs.so of the tcmu-runner daemon. A local, non-root user with
access to the D-Bus system bus could send a specially crafted string to
CheckConfig method resulting in various kinds of segmentation fault.
(CVE-2017-1000198)
* A NULL pointer dereference flaw was found in the UnregisterHandler method
implemented in the tcmu-runner daemon. A local, non-root user with access
to the D-Bus system bus could call the UnregisterHandler method with the
name of a handler loaded internally in tcmu-runner via dlopen() to trigger
DoS. (CVE-2017-1000200)
* A NULL pointer dereference flaw was found in the UnregisterHandler method
implemented in the tcmu-runner daemon. A local, non-root user with access
to the D-Bus system bus could call UnregisterHandler method with
non-existing tcmu handler as paramater to trigger DoS. (CVE-2017-1000201)
* A file information leak flaw was found in implementation of the
CheckConfig method in handler_qcow.so of the tcmu-runner daemon. A local,
non-root user with access to the D-Bus system bus could use this flaw to
leak arbitrary file names which might not be retrievable by non-root user.
(CVE-2017-1000199)
Summary
Solution
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
References
https://access.redhat.com/security/cve/CVE-2017-1000198 https://access.redhat.com/security/cve/CVE-2017-1000199 https://access.redhat.com/security/cve/CVE-2017-1000200 https://access.redhat.com/security/cve/CVE-2017-1000201 https://access.redhat.com/security/updates/classification/#moderate
Package List
Red Hat Gluster Storage Server 3.3 on RHEL-7:
Source:
tcmu-runner-1.2.0-16.el7rhgs.src.rpm
x86_64:
libtcmu-1.2.0-16.el7rhgs.x86_64.rpm
libtcmu-devel-1.2.0-16.el7rhgs.x86_64.rpm
tcmu-runner-1.2.0-16.el7rhgs.x86_64.rpm
tcmu-runner-debuginfo-1.2.0-16.el7rhgs.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
Topic
An update for tcmu-runner is now available for Red Hat Gluster Storage3.3.1 for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.
Topic
Relevant Releases Architectures
Red Hat Gluster Storage Server 3.3 on RHEL-7 - x86_64
Bugs Fixed
1472332 - tcmu-runner: Various security and functionality related bugfixes (multiple DoS, memory leaks)
1487246 - CVE-2017-1000198 tcmu-runner: glfs handler allows local DoS via crafted CheckConfig strings
1487247 - CVE-2017-1000201 tcmu-runner: UnregisterHandler dbus method in tcmu-runner daemon for non-existing handler causes DoS
1487251 - CVE-2017-1000200 tcmu-runner: UnregisterHandler D-Bus method in tcmu-runner daemon for internal handler causes DoS
1487252 - CVE-2017-1000199 tcmu-runner: qcow handler opens up an information leak via the CheckConfig D-Bus method
