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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2018-12893 Detail

Description

An issue was discovered in Xen through 4.10.x. One of the fixes in XSA-260 added some safety checks to help prevent Xen livelocking with debug exceptions. Unfortunately, due to an oversight, at least one of these safety checks can be triggered by a guest. A malicious PV guest can crash Xen, leading to a Denial of Service. All Xen systems which have applied the XSA-260 fix are vulnerable. Only x86 systems are vulnerable. ARM systems are not vulnerable. Only x86 PV guests can exploit the vulnerability. x86 HVM and PVH guests cannot exploit the vulnerability. An attacker needs to be able to control hardware debugging facilities to exploit the vulnerability, but such permissions are typically available to unprivileged users.


Metrics

 
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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.openwall.com/lists/oss-security/2018/06/27/11 Mailing List  Mitigation  Patch  Third Party Advisory 
http://www.openwall.com/lists/oss-security/2018/06/27/11 Mailing List  Mitigation  Patch  Third Party Advisory 
http://www.securityfocus.com/bid/104572 Third Party Advisory  VDB Entry 
http://www.securityfocus.com/bid/104572 Third Party Advisory  VDB Entry 
http://www.securitytracker.com/id/1041202 Third Party Advisory  VDB Entry 
http://www.securitytracker.com/id/1041202 Third Party Advisory  VDB Entry 
http://xenbits.xen.org/xsa/advisory-265.html Mitigation  Patch  Vendor Advisory 
http://xenbits.xen.org/xsa/advisory-265.html Mitigation  Patch  Vendor Advisory 
https://bugzilla.redhat.com/show_bug.cgi?id=1590979 Issue Tracking  Mitigation  Third Party Advisory 
https://bugzilla.redhat.com/show_bug.cgi?id=1590979 Issue Tracking  Mitigation  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html
https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html
https://security.gentoo.org/glsa/201810-06
https://security.gentoo.org/glsa/201810-06
https://support.citrix.com/article/CTX235748 Vendor Advisory 
https://support.citrix.com/article/CTX235748 Vendor Advisory 
https://www.debian.org/security/2018/dsa-4236 Third Party Advisory 
https://www.debian.org/security/2018/dsa-4236 Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  

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Change History

7 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-12893
NVD Published Date:
07/02/2018
NVD Last Modified:
11/20/2024
Source:
MITRE