CVE-2010-4255
First published: Mon Nov 29 2010(Updated: )
The fixup_page_fault function in arch/x86/traps.c in Xen 4.0.1 and earlier on 64-bit platforms, when paravirtualization is enabled, does not verify that kernel mode is used to call the handle_gdt_ldt_mapping_fault function, which allows guest OS users to cause a denial of service (host OS BUG_ON) via a crafted memory access.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| XenServer | =3.4.0 | |
| XenServer | =3.4.3 | |
| XenServer | =3.2.0 | |
| XenServer | =3.3.0 | |
| XenServer | =4.0.0 | |
| XenServer | =3.0.4 | |
| XenServer | =3.3.2 | |
| XenServer | =3.0.3 | |
| XenServer | =3.1.3 | |
| XenServer | =3.0.2 | |
| XenServer | =3.1.2 | |
| XenServer | =3.4.1 | |
| XenServer | =3.2.2 | |
| XenServer | =3.1.4 | |
| XenServer | <=4.0.1 | |
| XenServer | =3.2.3 | |
| XenServer | =3.4.2 | |
| XenServer | =3.3.1 | |
| XenServer | =3.2.1 |
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Reference Links
- http://lists.xensource.com/archives/html/xen-devel/2010-11/msg01650.html
- https://rhn.redhat.com/errata/RHSA-2011-0017.html
- https://bugzilla.redhat.com/show_bug.cgi?id=658155
- http://openwall.com/lists/oss-security/2010/11/30/5
- http://openwall.com/lists/oss-security/2010/11/30/8
- http://secunia.com/advisories/42884
- http://secunia.com/advisories/46397
- http://www.redhat.com/support/errata/RHSA-2011-0017.html
- http://www.securityfocus.com/archive/1/520102/100/0/threaded
- http://www.vmware.com/security/advisories/VMSA-2011-0012.html
Frequently Asked Questions
What is the severity of CVE-2010-4255?
CVE-2010-4255 has a severity rating that indicates it can lead to a denial of service on the host OS.
How do I fix CVE-2010-4255?
To fix CVE-2010-4255, upgrade to a version of Xen greater than 4.0.1 where the vulnerability is addressed.
Which systems are affected by CVE-2010-4255?
CVE-2010-4255 affects Xen versions 4.0.1 and earlier, specifically on 64-bit platforms with paravirtualization enabled.
What are the potential impacts of CVE-2010-4255?
The potential impacts of CVE-2010-4255 include denial of service, leading to host OS instability.
Is CVE-2010-4255 a remote vulnerability?
CVE-2010-4255 is not a remote vulnerability; it requires guest OS users to exploit it within their environment.
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- vendor/citrix
- canonical/xenserver
- version/xenserver/3.4.0
- version/xenserver/3.4.3
- version/xenserver/3.2.0
- version/xenserver/3.3.0
- version/xenserver/4.0.0
- version/xenserver/3.0.4
- version/xenserver/3.3.2
- version/xenserver/3.0.3
- version/xenserver/3.1.3
- version/xenserver/3.0.2
- version/xenserver/3.1.2
- version/xenserver/3.4.1
- version/xenserver/3.2.2
- version/xenserver/3.1.4
- version/xenserver/4.0.1
- version/xenserver/3.2.3
- version/xenserver/3.4.2
- version/xenserver/3.3.1
- version/xenserver/3.2.1