[Pkg-xen-devel] Bug#503811: CVE-2008-4405: DoS and possibly other impact

[Steffen Joeris]

Package: xen-3
Severity: important
Tags: security

Hi,
the following CVE (Common Vulnerabilities & Exposures) id was
published for xen-3.

CVE-2008-4405[0]:
| xend in Xen 3.0.3 does not properly limit the contents of the
| /local/domain xenstore directory tree, and does not properly restrict
| a guest VM's write access within this tree, which allows guest OS
| users to cause a denial of service and possibly have unspecified other
| impact by writing to (1) console/tty, (2) console/limit, or (3)
| image/device-model-pid.  NOTE: this issue was originally reported as
| an issue in libvirt 0.3.3 and xenstore, but CVE is considering the
| core issue to be related to Xen.

It seems that the redhat bugreport contains some more information[1].

Also, could you check xen-unstable as well and maybe clone this bug if justified?

If you fix the vulnerability please also make sure to include the
CVE id in your changelog entry.

Cheers
Steffen

For further information see:

[0] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4405
    http://security-tracker.debian.net/tracker/CVE-2008-4405
[1] https://bugzilla.redhat.com/show_bug.cgi?id=464817