Description

Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service. The attacker sends a stream of frames with an empty payload and without the end-of-stream flag. These frames can be DATA, HEADERS, CONTINUATION and/or PUSH_PROMISE. The peer spends time processing each frame disproportionate to attack bandwidth. This can consume excess CPU.

Remediation

References

CVE-2019-9518

Related Vulnerabilities

ownCloud Improper Privilege Management Vulnerability (CVE-2021-35946)

Moodle Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2021-43558)

Roundcube Files or Directories Accessible to External Parties Vulnerability (CVE-2017-16651)

Oracle Application Server Other Vulnerability (CVE-2007-0286)

WordPress Plugin WP-RESTful Multiple Cross-Site Scripting Vulnerabilities (0.1)

Severity

High

Classification

CVE-2019-9518 CWE-770 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Tags

Missing Update Known Vulnerabilities