VulnerabilityModified
CVE-2017-11173
Missing anchor in generated regex for rack-cors before 0.4.1 allows a malicious third-party site to perform CORS requests.
HIGH 8.8EPSS 2.34%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Missing anchor in generated regex for rack-cors before 0.4.1 allows a malicious third-party site to perform CORS requests. If the configuration were intended to allow only the trusted example.com domain name and not the malicious example.net domain name, then example.com.example.net (as well as example.com-example.net) would be inadvertently allowed.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 2.34% probability · 83th percentile
- CISA KEV
- Not listed
- Affected
- rack-cors project/rack-cors · debian/debian linux
- Source
- cve@mitre.org
References
- http://seclists.org/fulldisclosure/2017/Jul/22Mailing List, Third Party Advisory
- http://www.debian.org/security/2017/dsa-3931Third Party Advisory
- https://github.com/cyu/rack-cors/commit/42ebe6caa8e85ffa9c8a171bda668ba1acc7a5e6Patch, Third Party Advisory
- https://packetstormsecurity.com/files/143345/rack-cors-Missing-Anchor.htmlThird Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2017/Jul/22Mailing List, Third Party Advisory
- http://www.debian.org/security/2017/dsa-3931Third Party Advisory
- https://github.com/cyu/rack-cors/commit/42ebe6caa8e85ffa9c8a171bda668ba1acc7a5e6Patch, Third Party Advisory
- https://packetstormsecurity.com/files/143345/rack-cors-Missing-Anchor.htmlThird Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.