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CVE-2023-46218

medium CVSS 6.5 EPSS 1.7%

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.

Versions it affects

Software versions checked with the free lookup that CVE-2023-46218 applies to, and the release that fixes it where the sources name one.

curl 8.1.2 fixed in 2.17.0

At a glance

Severity
Medium
CVSS base score
6.5 out of 10
Known exploited
Not in CISA's catalogue of exploited vulnerabilities
EPSS
1.7% probability of exploitation in the next 30 days, higher than 76% of scored vulnerabilities
Weakness
CWE-178
Published
2023-12-07
NVD CVE.org

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