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Debian DSA-2544-1 : xen - denial of service
medium Nessus Plugin ID 62015
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Synopsis
The remote Debian host is missing a security-related update.Description
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.
Solution
Upgrade the xen packages.For the stable distribution (squeeze), these problems have been fixed in version 4.0.1-5.4.
See Also
https://security-tracker.debian.org/tracker/CVE-2012-3494
https://security-tracker.debian.org/tracker/CVE-2012-3496
Plugin Details
Severity: Medium
ID: 62015
File Name: debian_DSA-2544.nasl
Version: 1.12
Type: local
Agent: unix
Family: Debian Local Security Checks
Published: 9/10/2012
Updated: 1/11/2021
Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 4.7
Temporal Score: 3.5
Vector: CVSS2#AV:L/AC:M/Au:N/C:N/I:N/A:C
Vulnerability Information
CPE: p-cpe:/a:debian:debian_linux:xen, cpe:/o:debian:debian_linux:6.0
Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l
Exploit Ease: No known exploits are available
Patch Publication Date: 9/8/2012
Reference Information
CVE: CVE-2012-3494, CVE-2012-3496
DSA: 2544