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Debian Security Advisory DSA-2531-1 firstname.lastname@example.org http://www.debian.org/security/ Luciano Bello August 18, 2012 http://www.debian.org/security/faq
Package : xen Vulnerability : Denial of Service Problem type : remote Debian-specific: no CVE ID : CVE-2012-3432 CVE-2012-3433 Debian Bug : 683279
Several denial-of-service vulnerabilities have been discovered in Xen, the popular virtualization software. The Common Vulnerabilities and Exposures project identifies the following issues:
Guest mode unprivileged code, which has been granted the privilege to access MMIO regions, may leverage that access to crash the whole guest. Since this be used to crash a client from within, this vulnerability is consider with low impact.
A guest kernel can cause the host to become unresponsive for a period of time, potentially leading to a DoS. Since an attacker with full control in the guest can impact on the host, this vulnerability is consider with high impact.
For the stable distribution (squeeze), this problem has been fixed in version 4.0.1-5.3.
For the unstable distribution (sid), this problem has been fixed in version 4.1.3-1.
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: http://www.debian.org/security/
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