CVE-2023-46218 Security feature bypass in curl

What is CVE-2023-46218?

CVE-2023-46218 is a medium-severity vulnerability in Fedoraproject Fedora, published on 7 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-178

Which versions are affected by CVE-2023-46218?

It affects 2 products.

Products include Fedoraproject Fedora, Haxx Curl.

How do I fix CVE-2023-46218?

Upgrade to a fixed version.

Is CVE-2023-46218 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-46218 exists.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2023-46218, ALSA-2024:1129, AZL-32099, AZL-32119, AZL-32126, AZL-34618 and 20 more.