CVE-2019-9516
mediumpriority · attend · 46EPSS 0.563 · 99 %ileDEEURUUSEPSS · scored 2026-10-27
Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service. The attacker sends a stream of headers with a 0-length header name and 0-length header value, optionally Huffman encoded into 1-byte or greater headers. Some implementations allocate memory for these headers and keep the allocation alive until the session dies. This can consume excess memory.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–7.5
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (61)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2024-1050nginx: Mehrere Schwachstellen ermöglichen Denial of ServiceDeutsch2019-08-14csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in nginx ausnutzen, um einen Denial of Service Angriff durchzuführen.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (154)
External citations — patches, advisories, analysis.
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.htmlcnnvd
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.htmlcnnvd
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00035.htmlcnnvd
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00014.htmlcnnvd
- http://mailman.nginx.org/pipermail/nginx-announce/2019/000249.htmlcnnvd
- http://seclists.org/fulldisclosure/2019/Aug/16cnnvd
- https://access.redhat.com/errata/RHSA-2019:2745cnnvd
- https://access.redhat.com/errata/RHSA-2019:2746cnnvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan