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GHSA-c6qg-cjj8-47qp

Possible Denial of Service Vulnerability in Rack's header parsing

Source: GitHub Advisory Database (reviewed) Low CVE-2023-27539

Packages

EcosystemPackageAffectedFixed in
RubyGems rack >= 2.0.0, < 2.2.6.4 2.2.6.4
RubyGems rack >= 3.0.0, < 3.0.6.1 3.0.6.1

Details

As written in the advisory (Markdown source, shown as plain text).

There is a denial of service vulnerability in the header parsing component of Rack. This vulnerability has been assigned the CVE identifier CVE-2023-27539. Versions Affected: >= 2.0.0 Not affected: None. Fixed Versions: 2.2.6.4, 3.0.6.1 # Impact Carefully crafted input can cause header parsing in Rack to take an unexpected amount of time, possibly resulting in a denial of service attack vector. Any applications that parse headers using Rack (virtually all Rails applications) are impacted. # Workarounds Setting Regexp.timeout in Ruby 3.2 is a possible workaround.

References

External links from the advisory. They lead to third-party sites.