Linux Security
Linux Security
Linux Security

Debian: DSA-2544-1: xen security update

Date 08 Sep 2012
170
Posted By LinuxSecurity Advisories
Multiple denial of service vulnerabilities have been discovered in xen, an hypervisor. The Common Vulnerabilities and Exposures project identifies the following problems:
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Debian Security Advisory DSA-2544-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
https://www.debian.org/security/                          Raphael Geissert
September 08, 2012                     https://www.debian.org/security/faq
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Package        : xen
Vulnerability  : denial of service
Problem type   : local
Debian-specific: no
CVE ID         : CVE-2012-3494 CVE-2012-3496

Multiple denial of service vulnerabilities have been discovered in xen,
an hypervisor. The Common Vulnerabilities and Exposures project identifies
the following problems:

CVE-2012-3494:

    It was discovered that set_debugreg allows writes to reserved bits
    of the DR7 debug control register on amd64 (x86-64) paravirtualised
    guests, allowing a guest to crash the host.

CVE-2012-3496:

    Matthew Daley discovered that XENMEM_populate_physmap, when called
    with the MEMF_populate_on_demand flag set, a BUG (detection routine)
    can be triggered if a translating paging mode is not being used,
    allowing a guest to crash the host.

For the stable distribution (squeeze), these problems have been fixed in
version 4.0.1-5.4.

For the testing distribution (wheezy), these problems will be fixed
soon.

For the unstable distribution (sid), these problems have been fixed in
version 4.1.3-2.

We recommend that you upgrade your xen 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: This email address is being protected from spambots. You need JavaScript enabled to view it.

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