Linux Security
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Debian: DSA-2666-1: xen security update

Date 12 May 2013
160
Posted By LinuxSecurity Advisories
Multiple vulnerabilities have been discovered in the Xen hypervisor. The Common Vulnerabilities and Exposures project identifies the following problems:
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Debian Security Advisory DSA-2666-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
https://www.debian.org/security/                      Salvatore Bonaccorso
May 12, 2013                           https://www.debian.org/security/faq
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Package        : xen
Vulnerability  : several
Problem type   : remote
Debian-specific: no
CVE ID         : CVE-2013-1918 CVE-2013-1952 CVE-2013-1964

Multiple vulnerabilities have been discovered in the Xen hypervisor. The
Common Vulnerabilities and Exposures project identifies the following
problems:

CVE-2013-1918 (XSA 45) Several long latency operations are not preemptible

    Some page table manipulation operations for PV guests were not made
    preemptible, allowing a malicious or buggy PV guest kernel to mount a
    denial of service attack affecting the whole system.

CVE-2013-1952 (XSA 49) VT-d interrupt remapping source validation flaw for bridges

    Due to missing source validation on interrupt remapping table
    entries for MSI interrupts set up by bridge devices, a malicious
    domain with access to such a device, can mount a denial of service
    attack affecting the whole system.

CVE-2013-1964 (XSA 50) grant table hypercall acquire/release imbalance

    When releasing a particular, non-transitive grant after doing a grant
    copy operation Xen incorrectly releases an unrelated grant
    reference, leading possibly to a crash of the host system.
    Furthermore information leakage or privilege escalation cannot be
    ruled out.

For the oldstable distribution (squeeze), these problems have been fixed in
version 4.0.1-5.11.

For the stable distribution (wheezy), these problems have been fixed in
version 4.1.4-3+deb7u1.

For the testing distribution (jessie), these problems have been fixed in
version 4.1.4-4.

For the unstable distribution (sid), these problems have been fixed in
version 4.1.4-4.

Note that for the stable (wheezy), testing and unstable distribution,
CVE-2013-1964 (XSA 50) was already fixed in version 4.1.4-3.

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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