CVE-2020-9490

Published: 7 August 2020

Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via "H2Push off" will mitigate this vulnerability for unpatched servers.

Priority

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package	Release	Status
apache2 Launchpad, Ubuntu, Debian	bionic	Released (2.4.29-1ubuntu4.14)
	focal	Released (2.4.41-4ubuntu3.1)
	trusty	Not vulnerable (code not present)
	upstream	Released (2.4.44)
	xenial	Not vulnerable (code not present)
	Patches: upstream: https://svn.apache.org/r1880396 upstream: https://github.com/apache/httpd/commit/a61223e9cb906110f35ec144b93fee9eb80ad6e4

Severity score breakdown

Parameter	Value
Base score	7.5
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

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