#VU59089 Infinite loop in cflinuxfs3 - CVE-2021-3737

Vulnerability identifier: #VU59089

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-3737

CWE-ID: CWE-835

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
cflinuxfs3
Other software / Other software solutions

Vendor: Cloud Foundry Foundation

Description

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

The vulnerability exists due to infinite loop. A remote attacker who controls a malicious server can force the client to enter an infinite loop on a 100 Continue response.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

cflinuxfs3: 0.200.0 - 0.270.0

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External links
https://github.com/cloudfoundry/cflinuxfs3/releases/tag/0.271.0

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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.