UBUNTU-CVE-2020-2732
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.
02 / AFFECTED SOFTWARE
Affected packages
34 explicit affected versions
5 explicit affected versions
15 explicit affected versions
6 explicit affected versions
191 explicit affected versions
39 explicit affected versions
20 explicit affected versions
1 explicit affected versions
45 explicit affected versions
23 explicit affected versions
1 explicit affected versions
1 explicit affected versions
5 explicit affected versions
12 explicit affected versions
1 explicit affected versions
43 explicit affected versions
12 explicit affected versions
10 explicit affected versions
20 explicit affected versions
42 explicit affected versions
4 explicit affected versions
2 explicit affected versions
37 explicit affected versions
1 explicit affected versions
16 explicit affected versions
23 explicit affected versions
11 explicit affected versions
2 explicit affected versions
44 explicit affected versions
106 explicit affected versions
51 explicit affected versions
53 explicit affected versions
1 explicit affected versions
1 explicit affected versions
64 explicit affected versions
22 explicit affected versions
42 explicit affected versions
6 explicit affected versions
26 explicit affected versions
36 explicit affected versions
84 explicit affected versions
66 explicit affected versions
19 explicit affected versions
30 explicit affected versions
23 explicit affected versions
12 explicit affected versions
4 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://ubuntu.com/security/CVE-2020-2732
- https://ubuntu.com/security/notices/USN-4300-1
- https://ubuntu.com/security/notices/USN-4301-1
- https://ubuntu.com/security/notices/USN-4302-1
- https://ubuntu.com/security/notices/USN-4303-1
- https://ubuntu.com/security/notices/USN-4303-2
- https://www.cve.org/CVERecord?id=CVE-2020-2732
- https://www.openwall.com/lists/oss-security/2020/02/25/4
- https://www.spinics.net/lists/kvm/msg208259.html