#VU35880 Input validation error in Apache HTTP Server - CVE-2020-9490

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Main Vulnerability Database Vulnerabilities #VU35880

#VU35880 Input validation error in Apache HTTP Server - CVE-2020-9490

Published: August 8, 2020


Vulnerability identifier: #VU35880
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-9490
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Apache HTTP Server
Software vendor:
Apache Foundation

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when processing Cache-Digest header in HTTP/2 request. A remote attacker can pass specially crafted HTTP/2 request to the Apache HTTP Server, trigger the server to send the HTTP/2 PUSH and perform a denial of service (DoS) attack.


Remediation

Install updates from vendor's website.

Configuring the HTTP/2 feature via "H2Push off" will mitigate this vulnerability for unpatched servers.


External links