CVE-2021-410848.7HighCWE-918

CVE-2021-41084: Response Splitting from unsanitized headers in http4s

http4s

Affected: http4s · Exploitation: possible (1 to 10%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

1.2%probability of exploitation in the next 30 days

69th percentile

050100

Higher than 69% of scored CVEs

8.7HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

http4s is an open source scala interface for HTTP. In affected versions http4s is vulnerable to response-splitting or request-splitting attacks when untrusted user input is used to create any of the following fields: Header names (`Header.name`å), Header values (`Header.value`), Status reason phrases (`Status.reason`), URI paths (`Uri.Path`), URI authority registered names (`URI.RegName`) (through 0.21). This issue has been resolved in versions 0.21.30, 0.22.5, 0.23.4, and 1.0.0-M27 perform the following. As a matter of practice http4s services and client applications should sanitize any user input in the aforementioned fields before returning a request or response to the backend. The carriage return, newline, and null characters are the most threatening.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

http4s · http4s<= 0.21.28; >= 0.22.0, < 0.22.5; >= 0.23.0, < 0.23.4; >= 1.0.0-M1, < 1.0.0-M27

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Possible (1 to 10%). EPSS between 1% and 10%.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Server-Side Request Forgery
Vendor: http4s
Published: September 2021
Band: Possible (1 to 10%), September 2021

CoverageNo articles yet

No CyberSIXT article names CVE-2021-41084 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.