tenderlove
(Aaron Patterson)
1
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, 3.0.4.1
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
Credits
Thank you ooooooo_q for reporting this!
2-0-Fix-ReDoS-vulnerability-in-multipart-parser.patch (1.1 KB)
2-1-Fix-ReDoS-vulnerability-in-multipart-parser.patch (1.1 KB)
2-2-Fix-ReDoS-vulnerability-in-multipart-parser.patch (1.1 KB)
3-0-Fix-ReDoS-vulnerability-in-multipart-parser.patch (1.1 KB)