#VU71978 Resource exhaustion in Rack - CVE-2022-44572

Vulnerability identifier: #VU71978

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-44572

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Rack
Web applications / Modules and components for CMS

Vendor: Rack

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources when parsing Content-Disposition header in lib/rack/multipart/parser.rb. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Rack: 2.0 - 2.0.9.1, 2.1.0 - 2.1.4.1, 2.2.0 - 2.2.6, 3.0.0 - 3.0.4

---

External links
https://github.com/rack/rack/commit/a493640cd89aec9c148bc9d22c5f938ca9ed0dfa
https://bugzilla.redhat.com/show_bug.cgi?id=2164722
https://bugzilla.suse.com/show_bug.cgi?id=1207596

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.