CVE-2020-9490

HIGH
7.5
CVSS Score
Published: August 7, 2020 at 03:24 PM UTC
Updated: June 17, 2026 at 03:28 AM UTC
25 products affected across 7 vendorsDebian LinuxFedoraUbuntu Linux

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Severity
HIGH7.5
Exploit prediction
EPSS 89%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

2.4.20 ≤ v ≤ 2.4.432.4.20 ≤ v < 2.4.46
Affected range stops below 2.4.46, so it looks safe — our inference, not a vendor statement
8.2.0 ≤ v ≤ 8.2.2
8.2.0 ≤ v ≤ 8.2.2

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-444

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