Denial of service via multipart parsing in Rack
Published: January 18, 2023
SECURITY IDENTIFIERS
- CVE: CVE-2022-44572 (NVD)
- GHSA: GHSA-rqv2-275x-2jq5
- Vendor Advisory: https://github.com/rack/rack/releases/tag/v3.0.4.1
GEM
PATCHED VERSIONS
~> 2.0.9, >= 2.0.9.2
~> 2.1.4, >= 2.1.4.2
~> 2.2.6, >= 2.2.6.1
>= 3.0.4.1
DESCRIPTION
There is a denial of service vulnerability in the multipart parsing component of Rack. This vulnerability has been assigned the CVE identifier CVE-2022-44572.
Versions Affected: >= 2.0.0 Not affected: None. Fixed Versions: 2.0.9.2, 2.1.4.2, 2.2.6.1, 3.0.4.1
Impact
Carefully crafted input can cause RFC2183 multipart boundary parsing in Rack to take an unexpected amount of time, possibly resulting in a denial of service attack vector. Any applications that parse multipart posts using Rack (virtually all Rails applications) are impacted.
Workarounds
There are no feasible workarounds for this issue.