CVE-2023-46218

Public Exploit

Description

This flaw allows a malicious HTTP server to set "super cookies" in curl that are then passed back to more origins than what is otherwise allowed or possible. This allows a site to set cookies that then would get sent to different and unrelated sites and domains. It could do this by exploiting a mixed case flaw in curl's function that verifies a given cookie domain against the Public Suffix List (PSL). For example a cookie could be set with `domain=co.UK` when the URL used a lower case hostname `curl.co.uk`, even though `co.uk` is listed as a PSL domain.

6.5

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.33%

Vendor Advisory curl.se

Affected: curl curl

References

Link	Tags
https://hackerone.com/reports/2212193	issue tracking patch exploit third party advisory
https://curl.se/docs/CVE-2023-46218.html	patch vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3ZX3VW67N4ACRAPMV2QS2LVYGD7H2MVE/	third party advisory mailing list
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UOGXU25FMMT2X6UUITQ7EZZYMJ42YWWD/
https://lists.debian.org/debian-lts-announce/2023/12/msg00015.html
https://www.debian.org/security/2023/dsa-5587
https://security.netapp.com/advisory/ntap-20240125-0007/

Frequently Asked Questions

What is the severity of CVE-2023-46218?: CVE-2023-46218 has been scored as a medium severity vulnerability.
How to fix CVE-2023-46218?: To fix CVE-2023-46218, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-46218 being actively exploited in the wild?: It is possible that CVE-2023-46218 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-46218?: CVE-2023-46218 affects curl curl.

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