CVE-2018-3774 — Incorrect parsing in url-parse <1

Incorrect parsing in url-parse <1.4.3 returns wrong hostname which leads to multiple vulnerabilities such as SSRF, Open Redirect, Bypass Authentication Protocol.

01What is this vulnerability?

Incorrect parsing in url-parse <1.4.3 returns wrong hostname which leads to multiple vulnerabilities such as SSRF, Open Redirect, Bypass Authentication Protocol.

02Affected products

Vendor	Product	Versions
HackerOne	url	parse — 1.4.3

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-08-12T22:00:00.000Z
• Last modified: 2024-08-05T04:50:30.463Z

09References

• github.com — https://github.com/unshiftio/url-parse/commit/d7b582ec1243e8024e60ac0b62d2569c93…
• hackerone.com — https://hackerone.com/reports/384029
• github.com — https://github.com/unshiftio/url-parse/commit/53b1794e54d0711ceb52505e0f74145270…