CVE-2011-2901
First published: Thu Aug 04 2011(Updated: )
Off-by-one error in the __addr_ok macro in Xen 3.3 and earlier allows local 64 bit PV guest administrators to cause a denial of service (host crash) via unspecified hypercalls that ignore virtual-address bits.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Xen xen-unstable | <=3.3.0 | |
| Xen xen-unstable | =3.0.2 | |
| Xen xen-unstable | =3.0.3 | |
| Xen xen-unstable | =3.0.4 | |
| Xen xen-unstable | =3.1.3 | |
| Xen xen-unstable | =3.1.4 | |
| Xen xen-unstable | =3.2.0 | |
| Xen xen-unstable | =3.2.1 | |
| Xen xen-unstable | =3.2.2 | |
| Xen xen-unstable | =3.2.3 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2011/09/02/2
- https://bugzilla.redhat.com/show_bug.cgi?id=728042
- http://secunia.com/advisories/55082
- http://security.gentoo.org/glsa/glsa-201309-24.xml
- http://rhn.redhat.com/errata/RHSA-2011-1212.html
- https://rhn.redhat.com/errata/RHSA-2011-1212.html
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=521288&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=521288&action=edit
- https://rhn.redhat.com/errata/RHSA-2011-1813.html
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=798934
Frequently Asked Questions
What is the severity of CVE-2011-2901?
CVE-2011-2901 has a high severity as it can lead to a denial of service through a host crash.
How do I fix CVE-2011-2901?
To fix CVE-2011-2901, upgrade to a version of Xen later than 3.3.0, as the vulnerability is addressed in more recent updates.
Which versions of Xen are affected by CVE-2011-2901?
CVE-2011-2901 affects Xen versions 3.3.0 and earlier, including specific versions such as 3.0.2, 3.0.3, 3.0.4, 3.1.3, 3.1.4, 3.2.0, 3.2.1, 3.2.2, and 3.2.3.
What type of attack can exploit CVE-2011-2901?
CVE-2011-2901 can be exploited through unspecified hypercalls that manipulate virtual address bits.
Who can exploit CVE-2011-2901?
Local 64-bit paravirtual (PV) guest administrators can exploit CVE-2011-2901 to cause a denial of service.
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