Input validation error in Xen - CVE-2010-4255
Published: January 25, 2011 / Updated: August 11, 2020
Vulnerability identifier: #VU45408
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2010-4255
CWE-ID: CWE-20
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Xen Project
Affected software:
Xen
Xen
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
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.
How to mitigate CVE-2010-4255
Install update from vendor's website.
Sources
- http://lists.xensource.com/archives/html/xen-devel/2010-11/msg01650.html
- 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
- https://bugzilla.redhat.com/show_bug.cgi?id=658155