Ubuntu.comUB:CVE-2020-2732CVE-2020-2732
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:A/AC:M/Au:S/C:P/I:N/A:N
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
EPSS
Percentile
18.0%
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.
Bugs
Notes
| Author | Note |
|---|---|
| sbeattie | only systems running Intel processors are affected. |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | linux | <Â 4.15.0-91.92 | UNKNOWN |
| ubuntu | 19.10 | noarch | linux | <Â 5.3.0-42.34 | UNKNOWN |
| ubuntu | 16.04 | noarch | linux | <Â 4.4.0-176.206 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-aws | <Â 4.15.0-1063.67 | UNKNOWN |
| ubuntu | 19.10 | noarch | linux-aws | <Â 5.3.0-1013.14 | UNKNOWN |
| ubuntu | 14.04 | noarch | linux-aws | <Â 4.4.0-1064.68 | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-aws | <Â 4.4.0-1104.115 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-aws-5.0 | <Â 5.0.0-1027.30 | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-aws-hwe | <Â 4.15.0-1063.67~16.04.1 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-azure | <Â 5.0.0-1035.37 | UNKNOWN |
References
launchpad.net/bugs/cve/CVE-2020-2732
nvd.nist.gov/vuln/detail/CVE-2020-2732
security-tracker.debian.org/tracker/CVE-2020-2732
ubuntu.com/security/notices/USN-4300-1
ubuntu.com/security/notices/USN-4301-1
ubuntu.com/security/notices/USN-4302-1
ubuntu.com/security/notices/USN-4303-1
ubuntu.com/security/notices/USN-4303-2
www.cve.org/CVERecord?id=CVE-2020-2732
www.openwall.com/lists/oss-security/2020/02/25/4
www.spinics.net/lists/kvm/msg208259.html
Related
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:A/AC:M/Au:S/C:P/I:N/A:N
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
EPSS
Percentile
18.0%