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[QSA-0521152] Security Bundle

Qlustar Security Advisory 0521152

May 21, 2015


Summary:

Security bundle. A Qlustar security bundle is a cumulative update of packages that are taken from upstream Debian/Ubuntu without modification. Only packages that are used in a typical HPC/Storage cluster installation are mentioned in Qlustar Security Advisories. Other non-HPC related updates also enter the Qlustar repository, but their functionality is not separately verified by the Qlustar team. To track these updates subscribe to the general security mailing lists of Debian/Ubuntu.


Package(s)       : see upstream description of individual package
Qlustar releases : 9.0
Affected versions: All versions prior to this update
Vulnerability    : see upstream description of individual package
Problem type     : see upstream description of individual package
Qlustar-specific : no
CVE Id(s)        : see upstream description of individual package

This update includes several security related package updates from Debian/Ubuntu. The following list provides references to the upstream security report of the corresponding packages. You can view the original upstream advisory by clicking on the corresponding title.

Fuse vulnerability

Tavis Ormandy discovered that FUSE incorrectly filtered environment variables. A local attacker could use this issue to gain administrative privileges.

Qlustar specific note: In a default installation, this issue only affects nodes that have booted over the network. A quick fix for running nodes is to execute rm -f /bin/fusermount on them. This can be automated, so that it will be executed at the end of a reboot by generating a simple script with the following commands as root on the head-node (you can remove the script, after you will have updated all the packages):

  $ echo -e '#!/bin/bash\n[ -x /bin/fusermount ] && ' \
    'rm -f /bin/fusermount' > \
    /etc/qlustar/common/rc.boot/fix-fuse
  $ chmod 755 /etc/qlustar/common/rc.boot/fix-fuse

MariaDB vulnerabilities

Multiple security issues were discovered in MariaDB and this update includes a new upstream MariaDB version to fix these issues. MariaDB has been updated to 5.5.43. In addition to security fixes, the updated packages contain bug fixes, new features, and possibly incompatible changes. For a complete list, please consult the corresponding MariaDB Changelog.

QEMU vulnerabilities

Jason Geffner discovered that QEMU incorrectly handled the virtual floppy driver. This issue is known as VENOM. A malicious guest could use this issue to cause a denial of service, or possibly execute arbitrary code on the host as the user running the QEMU process.

Daniel P. Berrange discovered that QEMU incorrectly handled VNC websockets. A remote attacker could use this issue to cause QEMU to consume memory, resulting in a denial of service.

Libtasn1 vulnerability

Hanno Böck discovered that Libtasn1 incorrectly handled certain ASN.1 data. A remote attacker could possibly exploit this with specially crafted ASN.1 data and cause applications using Libtasn1 to crash, resulting in a denial of service, or possibly execute arbitrary code.

tcpdump vulnerabilities

It was discovered that tcpdump incorrectly handled printing certain packets. A remote attacker could use this issue to cause tcpdump to crash, resulting in a denial of service, or possibly execute arbitrary code.

Update instructions:

The problem can be corrected by updating your system to the following Qlustar package versions in addition to the package versions mentioned in the upstream reports (follow the Qlustar Update Guide):

qlustar-module-core-trusty-amd64-9.0.1     9.0.1.4-b448f971
qlustar-module-core-wheezy-amd64-9.0.1     9.0.1.4-b448f971
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