#VU71974 Resource exhaustion in Rack - CVE-2022-44570

Vulnerability identifier: #VU71974

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-2022-44570

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 within the get_byte_ranges() function in lib/rack/utils.rb when parsing the Range header. 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

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External links
https://github.com/rack/rack/commit/7a9d76a7850455a5ef9403203ea757ed110e7806
https://bugzilla.redhat.com/show_bug.cgi?id=2164719
https://bugzilla.suse.com/show_bug.cgi?id=1207597

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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.