CVE-2022-44572
Published: 9 February 2023
A denial of service vulnerability in the multipart parsing component of Rack fixed in 2.0.9.2, 2.1.4.2, 2.2.4.1 and 3.0.0.1 could allow an attacker tocraft input that 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.
Notes
| Author | Note |
|---|---|
| ccdm94 | variable related to the regular expression that causes the DoS was introduced in commit b3e90edf, together with RFC 2231 changes. |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
ruby-rack Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
| focal |
Needed
|
|
| jammy |
Needed
|
|
| kinetic |
Needed
|
|
| lunar |
Needed
|
|
| trusty |
Not vulnerable
(code not present)
|
|
| upstream |
Released
(2.0.9.2, 2.1.4.2, 2.2.6.1, 3.0.4.1)
|
|
| xenial |
Not vulnerable
(code not present)
|
|
|
Patches: upstream: https://github.com/rack/rack/commit/dc50f8e495f67eb933b1fc33ebee550908d945e6 (v2.0.9.2) upstream: https://github.com/rack/rack/commit/8291f502b0e1dcf514cc25c34e4bf0beec7a92ae (v2.1.4.2) upstream: https://github.com/rack/rack/commit/19e49f0f185d7e42ed5b402baec6c897a8c48029 (v2.2.6.1) |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-44572
- https://github.com/rack/rack/commit/dc50f8e495f67eb933b1fc33ebee550908d945e6 (v2.0.9.2)
- https://github.com/rack/rack/commit/8291f502b0e1dcf514cc25c34e4bf0beec7a92ae (v2.1.4.2)
- https://github.com/rack/rack/commit/19e49f0f185d7e42ed5b402baec6c897a8c48029 (v2.2.6.1)
- https://ubuntu.com/security/notices/USN-5910-1
- NVD
- Launchpad
- Debian