Improper Handling of Exceptional Conditions in IBM UrbanCode Release

1) Improper Handling of Exceptional Conditions

EUVDB-ID: #VU55422

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-30639

CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions

Exploit availability: No

Description

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

The vulnerability exists due to improper error management within the application when handling unexpected connection termination. A remote attacker can drop connection with the Apache Tomcat server, which triggers a non-blocking I/O error and causes all requests, handled by that request object, to fail. As a result, a remote attacker can initiate and drop connections to the server and perform a denial of service attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM UrbanCode Release: 6.2.5.3 - 6.2.5.4

External links

http://www.ibm.com/blogs/psirt/security-bulletin-ibm-urbancode-release-is-affected-by-cve-2021-30639/
http://www.ibm.com/support/pages/node/6550778

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.