CVE-2023-22465

Http4s has fatal error parsing User-Agent and Server headers

State: Published
Severity: 7.5 High
Published: Jan 4, 2023
Updated: Mar 10, 2025
Reserved: Dec 29, 2022

Description

Http4s is a Scala interface for HTTP services. Starting with version 0.1.0 and prior to versions 0.21.34, 0.22.15, 0.23.17, and 1.0.0-M38, the `User-Agent` and `Server` header parsers are susceptible to a fatal error on certain inputs. In http4s, modeled headers are lazily parsed, so this only applies to services that explicitly request these typed headers. Fixes are released in 0.21.34, 0.22.15, 0.23.17, and 1.0.0-M38. As a workaround, use the weakly typed header interface.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
http4shttp4s	>= 0.1.0, < 0.21.34Affected >= 0.22.0, < 0.22.15Affected >= 0.23.0, < 0.23.17Affected >= 1.0.0-M1, < 1.0.0-M38Affected

References

https://github.com/http4s/http4s/security/advisories/GHSA-54w6-vxfh-fw7f

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