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CVE-2017-11173

HIGH
8.8
CVSS Score
Published: July 13, 2017 at 03:00 AM UTC
Updated: June 17, 2026 at 01:01 AM UTC
2 products affected across 2 vendorsDebian LinuxRack Cors

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Severity
HIGH8.8
Exploit prediction
EPSS 2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
9.0
Rack Cors· Rack Cors Projectrubygems
95%
v < 0.4.1
Affected range stops below 0.4.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

x_refsource_MISCMailing ListThird Party Advisory
Source: [email protected]
http://seclists.org/fulldisclosure/2017/Jul/22
Vendor Advisoryx_refsource_DEBIANThird Party Advisory
Source: [email protected]
http://www.debian.org/security/2017/dsa-3931
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/cyu/rack-cors/commit/42ebe6caa8e85ffa9c8a171bda668ba1acc7a5e6
x_refsource_MISCThird Party AdvisoryVDB Entry
Source: [email protected]
https://packetstormsecurity.com/files/143345/rack-cors-Missing-Anchor.html

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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