CVE-2021-32643

Description

Http4s is a Scala interface for HTTP services. StaticFile.fromUrl can leak the presence of a directory on a server when the URL scheme is not file://, and the URL points to a fetchable resource under its scheme and authority. The function returns F[None], indicating no resource, if url.getFile is a directory, without first checking the scheme or authority of the URL. If a URL connection to the scheme and URL would return a stream, and the path in the URL exists as a directory on the server, the presence of the directory on the server could be inferred from the 404 response. The contents and other metadata about the directory are not exposed. This affects http4s versions: 0.21.7 through 0.21.23, 0.22.0-M1 through 0.22.0-M8, 0.23.0-M1, and 1.0.0-M1 through 1.0.0-M22. The [patch](https://github.com/http4s/http4s/commit/52e1890665410b4385e37b96bc49c5e3c708e4e9) is available in the following versions: v0.21.24, v0.22.0-M9, v0.23.0-M2, v1.0.0-M23. As a workaround users can avoid calling StaticFile.fromUrl with non-file URLs.

Risk Information

Base Score

5.8

MODERATE

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

EPSS Score

Exploitation Probability

0.316

Associated Vulnerability

Vulnerability	OS Platform
Vulnerabilities CVE-2021-32643 are fixed in http4s--core 0.22.0	Windows
Vulnerabilities CVE-2021-32643 are fixed in http4s--core 1.0.0	Windows
Vulnerabilities CVE-2021-32643 are fixed in http4s--core 0.21.24	Windows
Vulnerabilities CVE-2021-32643 are fixed in http4s--core 0.23.0	Windows
Vulnerabilities CVE-2021-32643 are fixed in http4s--core for Linux 0.22.0	Linux
Vulnerabilities CVE-2021-32643 are fixed in http4s--core for Linux 1.0.0	Linux
Vulnerabilities CVE-2021-32643 are fixed in http4s--core for Linux 0.21.24	Linux
Vulnerabilities CVE-2021-32643 are fixed in http4s--core for Linux 0.23.0	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234