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freebsdFreeBSD5D91370B-61FD-11EB-B87A-901B0EF719AB
HistoryJan 29, 2021 - 12:00 a.m.

FreeBSD -- Xen guests can triger backend Out Of Memory

2021-01-2900:00:00
vuxml.freebsd.org
70

4.9 Medium

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

6.5 Medium

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:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

0.0004 Low

EPSS

Percentile

14.2%

Problem Description:
Some OSes (including Linux, FreeBSD, and NetBSD) are processing watch
events using a single thread. If the events are received faster than
the thread is able to handle, they will get queued.
As the queue is unbound, a guest may be able to trigger a OOM in
the backend.

OSVersionArchitecturePackageVersionFilename
FreeBSDanynoarchfreebsd-kernel= 12.2UNKNOWN
FreeBSDanynoarchfreebsd-kernel< 12.2_3UNKNOWN

4.9 Medium

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

6.5 Medium

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:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

0.0004 Low

EPSS

Percentile

14.2%