CVE-2021-28543

2021-03-3110:07:28

redhat.com

access.redhat.com

varnish cache

null pointer dereference

header module

remote clients

cache misses

back-end servers

mitigation

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.002

Percentile

61.0%

JSON

A NULL pointer dereference issue was found in Varnish Cache through the ‘header’ module from the separate varnish-modules package. This flaw might allow for remote clients to cause Varnish to assert and restart, reducing overall availability and performance due to an increased number of cache misses, and may cause higher load on back-end servers. There is no potential for remote code execution or data leaks related to this vulnerability.