Vulnerability in Curl
CVE-2023-46218
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.017 (76.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000
Affected products
- Curl — versions 8.4.0, 7.46.0
- Haxx Curl
- Fedoraproject Fedora — versions 39
Weakness classification (CWE)
Public proof-of-concept exploits
References
- hackerone.com/reports/2212193 (Exploit, Patch, Third Party Advisory, Issue Tracking)
- curl.se/docs/CVE-2023-46218.html (Patch, Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/…
- lists.debian.org/debian-lts-announce/2023/12/msg00015.html
- www.debian.org/security/2023/dsa-5587
- security.netapp.com/advisory/ntap-20240125-0007/
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Frequently asked questions
- What is CVE-2023-46218?
- CVE-2023-46218 is a medium-severity vulnerability in Curl, classified under Improper Handling of Case Sensitivity. CVSS score: 6.5/10. Published 2023-12-07.
- How severe is CVE-2023-46218?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2023-46218 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.