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Denial of Service Vulnerability in Rack Content-Disposition parsing

Low severity GitHub Reviewed Published Jan 18, 2023 to the GitHub Advisory Database • Updated Oct 23, 2023

Package

bundler rack (RubyGems)

Affected versions

>= 2.0.0, < 2.0.9.2
>= 2.1.0, < 2.1.4.2
>= 2.2.0, < 2.2.6.1
>= 3.0.0.0, < 3.0.4.1

Patched versions

2.0.9.2
2.1.4.2
2.2.6.1
3.0.4.1

Description

There is a denial of service vulnerability in the Content-Disposition parsing component of Rack. This vulnerability has been assigned the CVE identifier CVE-2022-44571.

Versions Affected: >= 2.0.0 Not affected: None. Fixed Versions: 2.0.9.2, 2.1.4.2, 2.2.6.1, 3.0.0.1
Impact

Carefully crafted input can cause Content-Disposition header parsing in Rack to take an unexpected amount of time, possibly resulting in a denial of service attack vector. This header is used typically used in multipart parsing. Any applications that parse multipart posts using Rack (virtually all Rails applications) are impacted.
Releases

The fixed releases are available at the normal locations.
Workarounds

There are no feasible workarounds for this issue.
Patches

To aid users who aren’t able to upgrade immediately we have provided patches for the two supported release series. They are in git-am format and consist of a single changeset.

2-0-Fix-ReDoS-vulnerability-in-multipart-parser - Patch for 2.0 series
2-1-Fix-ReDoS-vulnerability-in-multipart-parser - Patch for 2.1 series
2-2-Fix-ReDoS-vulnerability-in-multipart-parser - Patch for 2.2 series
3-0-Fix-ReDoS-vulnerability-in-multipart-parser - Patch for 3.0 series

References

Published to the GitHub Advisory Database Jan 18, 2023
Reviewed Jan 18, 2023
Published by the National Vulnerability Database Feb 9, 2023
Last updated Oct 23, 2023

Severity

Low

EPSS score

0.154%
(52nd percentile)

CVE ID

CVE-2022-44571

GHSA ID

GHSA-93pm-5p5f-3ghx

Source code

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