CVE-2021-32643
Apache Http4s Directory Information Leak
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.
INFO
Published Date :
May 27, 2021, 6:15 p.m.
Last Modified :
June 10, 2021, 1:32 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-32643.
| URL | Resource |
|---|---|
| https://github.com/http4s/http4s/commit/52e1890665410b4385e37b96bc49c5e3c708e4e9 | Patch Third Party Advisory |
| https://github.com/http4s/http4s/security/advisories/GHSA-6h7w-fc84-x7p6 | Patch Third Party Advisory |
| https://mvnrepository.com/artifact/org.http4s/http4s-core | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2021-32643 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-32643 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Jun. 10, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N Changed Reference Type https://github.com/http4s/http4s/commit/52e1890665410b4385e37b96bc49c5e3c708e4e9 No Types Assigned https://github.com/http4s/http4s/commit/52e1890665410b4385e37b96bc49c5e3c708e4e9 Patch, Third Party Advisory Changed Reference Type https://github.com/http4s/http4s/security/advisories/GHSA-6h7w-fc84-x7p6 No Types Assigned https://github.com/http4s/http4s/security/advisories/GHSA-6h7w-fc84-x7p6 Patch, Third Party Advisory Changed Reference Type https://mvnrepository.com/artifact/org.http4s/http4s-core No Types Assigned https://mvnrepository.com/artifact/org.http4s/http4s-core Third Party Advisory Added CWE NIST CWE-22 Added CPE Configuration OR *cpe:2.3:a:typelevel:http4s:*:*:*:*:*:*:*:* versions from (including) 0.21.7 up to (excluding) 0.21.24 *cpe:2.3:a:typelevel:http4s:0.22.0:milestone1:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:0.22.0:milestone2:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:0.22.0:milestone3:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:0.22.0:milestone4:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:0.22.0:milestone5:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:0.22.0:milestone6:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:0.22.0:milestone7:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:0.22.0:milestone8:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:0.23.0:milestone1:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone1:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone10:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone11:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone12:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone13:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone14:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone15:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone16:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone17:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone18:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone19:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone2:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone20:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone21:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone22:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone3:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone4:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone5:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone6:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone7:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone8:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone9:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-32643 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-32643
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.10 }} 0.01%
score
0.38559
percentile