Denial of service in IBM App Connect Enterprise Certified Container

1) Resource management error

EUVDB-ID: #VU56024

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-2021-33198

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 when handling a large exponent to the math/big.Rat SetString or UnmarshalText method.  A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

App Connect Enterprise Certified Container: 1.0 - 1.4

CPE2.3

• cpe:2.3:a:ibm_corporation:app_connect_enterprise_certified_container:1.0:*:*:*:*:*:*:*
• cpe:2.3:a:ibm_corporation:app_connect_enterprise_certified_container:1.1:*:*:*:*:*:*:*
• cpe:2.3:a:ibm_corporation:app_connect_enterprise_certified_container:1.1.5:*:*:*:*:*:*:*

External links

https://www.ibm.com/blogs/psirt/security-bulletin-ibm-app-connect-enterprise-certified-container-may-be-vulnerable-to-denial-of-service-via-cve-2021-33198/
https://www.ibm.com/support/pages/node/6488893

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.