CVE-2018-12893
Vulnerability from cvelistv5
Published
2018-07-02 17:00
Modified
2024-08-05 08:45
Severity ?
Summary
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.
References
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2018/06/27/11Mitigation, Mailing List, Third Party Advisory, Patch
cve@mitre.orghttp://www.securityfocus.com/bid/104572Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.securitytracker.com/id/1041202Third Party Advisory, VDB Entry
cve@mitre.orghttp://xenbits.xen.org/xsa/advisory-265.htmlMitigation, Patch, Vendor Advisory
cve@mitre.orghttps://bugzilla.redhat.com/show_bug.cgi?id=1590979Mitigation, Issue Tracking, Third Party Advisory
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2018/11/msg00013.html
cve@mitre.orghttps://security.gentoo.org/glsa/201810-06
cve@mitre.orghttps://support.citrix.com/article/CTX235748Vendor Advisory
cve@mitre.orghttps://www.debian.org/security/2018/dsa-4236Third Party Advisory
Impacted products
n/an/a
Show details on NVD website

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