CVE-2018-12893

Name
CVE-2018-12893
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.
NVD Severity
medium
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

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

Match rules

CPE URI Source package Min version Max version
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:x86 xen >= None <= 4.10.0

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
xen edge-main 4.11.0-r0 None fixed
xen edge-main 4.10.0-r2 None possibly vulnerable
xen edge-main 4.10.0-r1 None possibly vulnerable
xen edge-main 4.9.1-r1 None possibly vulnerable
xen edge-main 4.9.0-r7 None possibly vulnerable
xen edge-main 4.9.0-r6 None possibly vulnerable
xen edge-main 4.9.0-r5 None possibly vulnerable
xen edge-main 4.9.0-r4 None possibly vulnerable
xen edge-main 4.9.0-r2 None possibly vulnerable
xen edge-main 4.9.0-r1 None possibly vulnerable
xen edge-main 4.9.0-r0 None possibly vulnerable
xen edge-main 4.8.1-r2 None possibly vulnerable
xen edge-main 4.7.2-r0 None possibly vulnerable
xen edge-main 4.7.1-r5 None possibly vulnerable
xen edge-main 4.7.1-r4 None possibly vulnerable
xen edge-main 4.7.1-r3 None possibly vulnerable
xen edge-main 4.7.1-r1 None possibly vulnerable
xen edge-main 4.7.0-r5 None possibly vulnerable
xen edge-main 4.7.0-r1 None possibly vulnerable
xen edge-main 4.7.0-r0 None possibly vulnerable
xen 3.22-main 4.11.0-r0 None fixed
xen 3.22-main 4.10.0-r2 None possibly vulnerable
xen 3.22-main 4.10.0-r1 None possibly vulnerable
xen 3.22-main 4.9.1-r1 None possibly vulnerable
xen 3.22-main 4.9.0-r7 None possibly vulnerable
xen 3.22-main 4.9.0-r6 None possibly vulnerable
xen 3.22-main 4.9.0-r5 None possibly vulnerable
xen 3.22-main 4.9.0-r4 None possibly vulnerable
xen 3.22-main 4.9.0-r2 None possibly vulnerable
xen 3.22-main 4.9.0-r1 None possibly vulnerable
xen 3.22-main 4.9.0-r0 None possibly vulnerable
xen 3.22-main 4.8.1-r2 None possibly vulnerable
xen 3.22-main 4.7.2-r0 None possibly vulnerable
xen 3.22-main 4.7.1-r5 None possibly vulnerable
xen 3.22-main 4.7.1-r4 None possibly vulnerable
xen 3.22-main 4.7.1-r3 None possibly vulnerable
xen 3.22-main 4.7.1-r1 None possibly vulnerable
xen 3.22-main 4.7.0-r5 None possibly vulnerable
xen 3.22-main 4.7.0-r1 None possibly vulnerable
xen 3.22-main 4.7.0-r0 None possibly vulnerable
xen 3.21-main 4.11.0-r0 None fixed
xen 3.21-main 4.10.0-r2 None possibly vulnerable
xen 3.21-main 4.10.0-r1 None possibly vulnerable
xen 3.21-main 4.9.1-r1 None possibly vulnerable
xen 3.21-main 4.9.0-r7 None possibly vulnerable
xen 3.21-main 4.9.0-r6 None possibly vulnerable
xen 3.21-main 4.9.0-r5 None possibly vulnerable
xen 3.21-main 4.9.0-r4 None possibly vulnerable
xen 3.21-main 4.9.0-r2 None possibly vulnerable
xen 3.21-main 4.9.0-r1 None possibly vulnerable
xen 3.21-main 4.9.0-r0 None possibly vulnerable
xen 3.21-main 4.8.1-r2 None possibly vulnerable
xen 3.21-main 4.7.2-r0 None possibly vulnerable
xen 3.21-main 4.7.1-r5 None possibly vulnerable
xen 3.21-main 4.7.1-r4 None possibly vulnerable
xen 3.21-main 4.7.1-r3 None possibly vulnerable
xen 3.21-main 4.7.1-r1 None possibly vulnerable
xen 3.21-main 4.7.0-r5 None possibly vulnerable
xen 3.21-main 4.7.0-r1 None possibly vulnerable
xen 3.21-main 4.7.0-r0 None possibly vulnerable
xen 3.20-main 4.11.0-r0 None fixed
xen 3.20-main 4.10.0-r2 None possibly vulnerable
xen 3.20-main 4.10.0-r1 None possibly vulnerable
xen 3.20-main 4.9.1-r1 None possibly vulnerable
xen 3.20-main 4.9.0-r7 None possibly vulnerable
xen 3.20-main 4.9.0-r6 None possibly vulnerable
xen 3.20-main 4.9.0-r5 None possibly vulnerable
xen 3.20-main 4.9.0-r4 None possibly vulnerable
xen 3.20-main 4.9.0-r2 None possibly vulnerable
xen 3.20-main 4.9.0-r1 None possibly vulnerable
xen 3.20-main 4.9.0-r0 None possibly vulnerable
xen 3.20-main 4.8.1-r2 None possibly vulnerable
xen 3.20-main 4.7.2-r0 None possibly vulnerable
xen 3.20-main 4.7.1-r5 None possibly vulnerable
xen 3.20-main 4.7.1-r4 None possibly vulnerable
xen 3.20-main 4.7.1-r3 None possibly vulnerable
xen 3.20-main 4.7.1-r1 None possibly vulnerable
xen 3.20-main 4.7.0-r5 None possibly vulnerable
xen 3.20-main 4.7.0-r1 None possibly vulnerable
xen 3.20-main 4.7.0-r0 None possibly vulnerable
xen 3.19-main 4.11.0-r0 None fixed
xen 3.19-main 4.10.0-r2 None possibly vulnerable
xen 3.19-main 4.10.0-r1 None possibly vulnerable
xen 3.19-main 4.9.1-r1 None possibly vulnerable
xen 3.19-main 4.9.0-r7 None possibly vulnerable
xen 3.19-main 4.9.0-r6 None possibly vulnerable
xen 3.19-main 4.9.0-r5 None possibly vulnerable
xen 3.19-main 4.9.0-r4 None possibly vulnerable
xen 3.19-main 4.9.0-r2 None possibly vulnerable
xen 3.19-main 4.9.0-r1 None possibly vulnerable
xen 3.19-main 4.9.0-r0 None possibly vulnerable
xen 3.19-main 4.8.1-r2 None possibly vulnerable
xen 3.19-main 4.7.2-r0 None possibly vulnerable
xen 3.19-main 4.7.1-r5 None possibly vulnerable
xen 3.19-main 4.7.1-r4 None possibly vulnerable
xen 3.19-main 4.7.1-r3 None possibly vulnerable
xen 3.19-main 4.7.1-r1 None possibly vulnerable
xen 3.19-main 4.7.0-r5 None possibly vulnerable
xen 3.19-main 4.7.0-r1 None possibly vulnerable
xen 3.19-main 4.7.0-r0 None possibly vulnerable
xen 3.18-main 4.11.0-r0 None fixed
xen 3.17-main 4.11.0-r0 None fixed
xen 3.12-main 4.11.0-r0 None fixed
xen 3.11-main 4.11.0-r0 None fixed
xen 3.10-main 4.11.0-r0 None fixed