CVE-2023-22465

high-risk
Published 2023-01-04

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.

Do I need to act?

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0.34% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (20)

Http4S
Http4S
Http4S
Http4S
Http4S
Http4S
Http4S
Http4S
Http4S
Http4S
Http4S
Http4S
Http4S
Http4S
Http4S
Http4S
Http4S
Http4S
Http4S
Http4S

Affected Vendors

Typelevel

References (2)

Exploit https://github.com/http4s/http4s/security/advisories/GHSA-54w6-vxfh-fw7f
Exploit https://github.com/http4s/http4s/security/advisories/GHSA-54w6-vxfh-fw7f
51
/ 100
high-risk
Severity 26/34 · High
Exploitability 1/34 · Minimal
Exposure 24/34 · High