CVE-2022-41556
7.5
HIGH
CVSS 3.1
EPSS 1.8%
Description
A resource leak in gw_backend.c in lighttpd 1.4.56 through 1.4.66 could lead to a denial of service (connection-slot exhaustion) after a large amount of anomalous TCP behavior by clients. It is related to RDHUP mishandling in certain HTTP/1.1 chunked situations. Use of mod_fastcgi is, for example, affected. This is fixed in 1.4.67.
How to fix CVE-2022-41556
To remediate CVE-2022-41556, upgrade the affected package to a fixed version below.
- Alpine/lighttpd—upgrade to 1.4.67-r0 or later
- —upgrade to 1.4.59-1+deb11u2 or later
Is CVE-2022-41556 being exploited?
Low — EPSS is 1.8%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.4.67-r0
- from 0, < 1.4.59-1+deb11u2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |