CVE-2019-9516
6.5
MEDIUM
CVSS 3.1
EPSS 56.3%
Description
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.
How to fix CVE-2019-9516
To remediate CVE-2019-9516, upgrade the affected package to a fixed version below.
- —upgrade to 1.16.1-r0 or later
- —upgrade to 10.16.3-r0 or later
Is CVE-2019-9516 being exploited?
Likely — EPSS is 56.3%, placing CVE-2019-9516 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (2)
- >= 1.9.5, < 1.16.1-r0
- from 0, < 10.16.3-r0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |