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CVE
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CVE-2020-2732Date: (C)2020-04-09   (M)2024-04-19


A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 6.8CVSS Score : 2.3
Exploit Score: 2.3Exploit Score: 4.4
Impact Score: 4.0Impact Score: 2.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: ADJACENT_NETWORKAccess Vector: ADJACENT_NETWORK
Attack Complexity: LOWAccess Complexity: MEDIUM
Privileges Required: LOWAuthentication: SINGLE
User Interaction: NONEConfidentiality: PARTIAL
Scope: CHANGEDIntegrity: NONE
Confidentiality: HIGHAvailability: NONE
Integrity: NONE 
Availability: NONE 
  
Reference:
DSA-4667
DSA-4698
https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
https://bugzilla.redhat.com/show_bug.cgi?id=1805135
https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ec
https://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75c
https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020d
https://linux.oracle.com/errata/ELSA-2020-5540.html
https://linux.oracle.com/errata/ELSA-2020-5542.html
https://linux.oracle.com/errata/ELSA-2020-5543.html
https://www.openwall.com/lists/oss-security/2020/02/25/3
https://www.spinics.net/lists/kvm/msg208259.html

CPE    1
cpe:/o:redhat:enterprise_linux:7.0
CWE    1
CWE-200
OVAL    35
oval:org.secpod.oval:def:1502818
oval:org.secpod.oval:def:1502819
oval:org.secpod.oval:def:89043546
oval:org.secpod.oval:def:70183
...

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