Improper input validation in Http4s

CVE-2023-22465

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.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.3th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2023-22465: held from 0.008 to 0.008.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

  • Http4s — versions >= 0.1.0, < 0.21.34, >= 0.22.0, < 0.22.15, >= 0.23.0, < 0.23.17
  • Typelevel Http4s — versions 1.0.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2023-22465?
CVE-2023-22465 is a high-severity vulnerability in Http4s, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2023-01-04.
How severe is CVE-2023-22465?
High severity. CVSS v3 base score is 7.5 out of 10.