Multiple vulnerabilities in Cloud Foundry cflinuxfs3

Published: 2021-12-22

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-3733 CVE-2021-3737
CWE-ID	CWE-399 CWE-835
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	cflinuxfs3 Other software / Other software solutions
Vendor	Cloud Foundry Foundation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Resource management error

EUVDB-ID: #VU58295

Risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-3733

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to improper management of internal resources within the application within the AbstractBasicAuthHandler class in urllib. A remote attacker with control over the server can perform regular expression denial of service attack during authentication.

Mitigation

Install update from vendor's website.

Vulnerable software versions

cflinuxfs3: 0.200.0 - 0.270.0

CPE2.3

External links

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

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.

2) Infinite loop

EUVDB-ID: #VU59089