CVE-2023-46218

Affected: curl, Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP, Siemens RUGGEDCOM ROX MX5000, Siemens RUGGEDCOM ROX MX5000RE, Siemens RUGGEDCOM ROX RX1400, Siemens RUGGEDCOM ROX RX1500, Siemens RUGGEDCOM ROX RX1501, Siemens RUGGEDCOM ROX RX1510 and 6 more

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.

USN-6535-1 — curl vulnerabilities

Affected: Ubuntu:20.04:LTS: curl, Ubuntu:22.04:LTS: curl

Harry Sintonen discovered that curl incorrectly handled mixed case cookie domains. A remote attacker could possibly use this issue to set cookies that get sent to different and unrelated sites and domains. (CVE-2023-46218)

Maksymilian Arciemowicz discovered that curl incorrectly handled long file names when saving HSTS data. This could result in curl losing HSTS data, and subsequent requests to a site would be done without it, contrary to expectations. This issue only affected Ubuntu 23.04 and Ubuntu 23.10. (CVE-2023-46219)

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CVE-2023-46218

USN-6535-1 — curl vulnerabilities