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cve[email protected]CVE-2020-29568
HistoryDec 15, 2020 - 5:15 p.m.

CVE-2020-29568

2020-12-1517:15:14
CWE-770
[email protected]
web.nvd.nist.gov
200
5
cve-2020-29568
xen
backend
oom
watch events
vulnerability
linux
freebsd
netbsd
nvd

CVSS2

4.9

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

6.5

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

AI Score

7.3

Confidence

High

EPSS

0

Percentile

14.2%

JSON

An issue was discovered in Xen through 4.14.x. Some OSes (such as 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 unbounded, a guest may be able to trigger an OOM in the backend. All systems with a FreeBSD, Linux, or NetBSD (any version) dom0 are vulnerable.

Affected configurations

NVD
Node
xenxenRange≤4.14.1
Node
debiandebian_linuxMatch9.0
OR
debiandebian_linuxMatch10.0
VendorProductVersionCPE
xenxencpe:/o:xen:xen::::

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CVSS2

4.9

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

6.5

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

AI Score

7.3

Confidence

High

EPSS

0

Percentile

14.2%

JSON
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