FreeBSD80ADC394-DDAF-11E5-B2BD-002590263BF5xen-kernel -- VMX: intercept issue with INVLPG on non-canonical address
4.7 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:N/I:N/A:C
6.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
0.002 Low
EPSS
Percentile
59.2%
The Xen Project reports:
While INVLPG does not cause a General Protection Fault when used on
a non-canonical address, INVVPID in its “individual address”
variant, which is used to back the intercepted INVLPG in certain
cases, fails in such cases. Failure of INVVPID results in a
hypervisor bug check.
A malicious guest can crash the host, leading to a Denial of
Service.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| FreeBSD | any | noarch | xen-kernel | = 3.3 | UNKNOWN |
| FreeBSD | any | noarch | xen-kernel | < 4.5.2_2 | UNKNOWN |
References
Related
4.7 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:N/I:N/A:C
6.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
0.002 Low
EPSS
Percentile
59.2%