CVE-2021-39185
Http4s CORS Origin Reflection and Null Origin Vulnerabilities
Description
Http4s is a minimal, idiomatic Scala interface for HTTP services. In http4s versions 0.21.26 and prior, 0.22.0 through 0.22.2, 0.23.0, 0.23.1, and 1.0.0-M1 through 1.0.0-M24, the default CORS configuration is vulnerable to an origin reflection attack. The middleware is also susceptible to a Null Origin Attack. The problem is fixed in 0.21.27, 0.22.3, 0.23.2, and 1.0.0-M25. The original `CORS` implementation and `CORSConfig` are deprecated. See the GitHub GHSA for more information, including code examples and workarounds.
INFO
Published Date :
Sept. 1, 2021, 8:15 p.m.
Last Modified :
Sept. 15, 2021, 12:12 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
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-2021-39185.
| URL | Resource |
|---|---|
| https://github.com/http4s/http4s/releases/tag/v0.23.2 | Third Party Advisory |
| https://github.com/http4s/http4s/security/advisories/GHSA-52cf-226f-rhr6 | Patch 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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-39185 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-39185 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]
Sep. 15, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:N) Changed Reference Type https://github.com/http4s/http4s/releases/tag/v0.23.2 No Types Assigned https://github.com/http4s/http4s/releases/tag/v0.23.2 Third Party Advisory Changed Reference Type https://github.com/http4s/http4s/security/advisories/GHSA-52cf-226f-rhr6 No Types Assigned https://github.com/http4s/http4s/security/advisories/GHSA-52cf-226f-rhr6 Patch, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:typelevel:http4s:*:*:*:*:*:*:*:* versions up to (including) 0.21.26 *cpe:2.3:a:typelevel:http4s:*:*:*:*:*:*:*:* versions from (including) 0.22.0 up to (including) 0.22.2 *cpe:2.3:a:typelevel:http4s:0.23.0:*:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:0.23.1:*:*:*:*:*:*:* *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:milestone23:*:*:*:*:*:* *cpe:2.3:a:typelevel:http4s:1.0.0:milestone24:*:*:*:*:*:* *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-2021-39185 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-2021-39185
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.15 }} 0.01%
score
0.50845
percentile