CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
EPSS
Percentile
19.7%
An issue was discovered in Xen through 4.11.x. The logic in oxenstored for handling writes depended on the order of evaluation of expressions making up a tuple. As indicated in section 7.7.3 “Operations on data structures” of the OCaml manual, the order of evaluation of subexpressions is not specified. In practice, different implementations behave differently. Thus, oxenstored may not enforce the configured quota-maxentity. This allows a malicious or buggy guest to write as many xenstore entries as it wishes, causing unbounded memory usage in oxenstored. This can lead to a system-wide DoS.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 12 | all | xen | < 4.11.1~pre.20180911.5acdd26fdc+dfsg-2 | xen_4.11.1~pre.20180911.5acdd26fdc+dfsg-2_all.deb |
Debian | 11 | all | xen | < 4.11.1~pre.20180911.5acdd26fdc+dfsg-2 | xen_4.11.1~pre.20180911.5acdd26fdc+dfsg-2_all.deb |
Debian | 999 | all | xen | < 4.11.1~pre.20180911.5acdd26fdc+dfsg-2 | xen_4.11.1~pre.20180911.5acdd26fdc+dfsg-2_all.deb |
Debian | 13 | all | xen | < 4.11.1~pre.20180911.5acdd26fdc+dfsg-2 | xen_4.11.1~pre.20180911.5acdd26fdc+dfsg-2_all.deb |
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
EPSS
Percentile
19.7%