CVE-2018-7540medium
New! CVE Severity Now Using CVSS v3
The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.
Description
An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service (host OS CPU hang) via non-preemptable L3/L4 pagetable freeing.
References
http://www.securityfocus.com/bid/103174
http://www.securitytracker.com/id/1040773
https://lists.debian.org/debian-lts-announce/2018/03/msg00003.html
https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html
https://security.gentoo.org/glsa/201810-06
https://support.citrix.com/article/CTX232096
https://support.citrix.com/article/CTX232655
Details
Source: MITRE
Published: 2018-02-27
Updated: 2018-11-13
Type: CWE-400
Risk Information
CVSS v2
Base Score: 4.9
Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C
Impact Score: 6.9
Exploitability Score: 3.9
Severity: MEDIUM
CVSS v3
Base Score: 6.5
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Impact Score: 4
Exploitability Score: 2
Severity: MEDIUM
Vulnerable Software
Configuration 1
OR
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* versions up to 4.10.0 (inclusive)
Configuration 2
OR
Tenable Plugins
| ID | Name | Product | Family | Severity |
|---|---|---|---|---|
| 140019 | OracleVM 3.4 : xen (OVMSA-2020-0039) (Bunker Buster) (Foreshadow) (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout) (Meltdown) (POODLE) (Spectre) | Nessus | OracleVM Local Security Checks | critical |
| 118963 | OracleVM 3.2 : xen (OVMSA-2018-0272) (Foreshadow) (Spectre) | Nessus | OracleVM Local Security Checks | high |
| 118962 | OracleVM 3.3 : xen (OVMSA-2018-0271) (Foreshadow) (Spectre) | Nessus | OracleVM Local Security Checks | high |
| 118892 | Debian DLA-1577-1 : xen security update | Nessus | Debian Local Security Checks | high |
| 118506 | GLSA-201810-06 : Xen: Multiple vulnerabilities (Foreshadow) (Meltdown) (Spectre) | Nessus | Gentoo Local Security Checks | critical |
| 111992 | OracleVM 3.4 : xen (OVMSA-2018-0248) (Bunker Buster) (Foreshadow) (Meltdown) (POODLE) (Spectre) | Nessus | OracleVM Local Security Checks | critical |
| 109987 | OracleVM 3.4 : xen (OVMSA-2018-0218) (Meltdown) (Spectre) | Nessus | OracleVM Local Security Checks | high |
| 109751 | openSUSE Security Update : xen (openSUSE-2018-454) (Meltdown) | Nessus | SuSE Local Security Checks | high |
| 109677 | SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2018:1184-1) (Meltdown) | Nessus | SuSE Local Security Checks | high |
| 109001 | SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2018:0909-1) (Meltdown) (Spectre) | Nessus | SuSE Local Security Checks | high |
| 108887 | Citrix XenServer Multiple Vulnerabilities (CTX232655) | Nessus | Misc. | critical |
| 108886 | Citrix XenServer Multiple Vulnerabilities (CTX232096) | Nessus | Misc. | high |
| 108492 | Fedora 26 : xen (2018-0746dac335) | Nessus | Fedora Local Security Checks | high |
| 108369 | SUSE SLES11 Security Update : xen (SUSE-SU-2018:0678-1) (Meltdown) (Spectre) | Nessus | SuSE Local Security Checks | high |
| 107176 | Fedora 27 : xen (2018-c553a586c8) | Nessus | Fedora Local Security Checks | high |
| 107134 | Debian DLA-1300-1 : xen security update | Nessus | Debian Local Security Checks | high |
| 107130 | OracleVM 3.4 : xen (OVMSA-2018-0021) (Meltdown) (Spectre) | Nessus | OracleVM Local Security Checks | high |
| 107129 | OracleVM 3.4 : xen (OVMSA-2018-0020) (Meltdown) (Spectre) | Nessus | OracleVM Local Security Checks | high |
| 107123 | Debian DSA-4131-1 : xen - security update | Nessus | Debian Local Security Checks | high |
| 107097 | Xen guest_remove_page() Function Pagetable Unpinning Handling Guest-to-host DoS (XSA-252) | Nessus | Misc. | medium |