Remote code execution in IBM WebSphere Application Server (Apache Log4j component)

1) Code Injection

EUVDB-ID: #VU58816

Risk: Critical

CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2021-44228

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation when processing LDAP requests. A remote attacker can send a specially crafted request to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, we are aware of attackers exploiting the vulnerability in the wild.

Mitigation

Install update from vendor's website.

The recommended solution is to apply the interim fix as soon as possible.

For WebSphere Application Server traditional:

For V9.0.0.0 through 9.0.5.10:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH42728
--OR--
· Apply Fix Pack 9.0.5.11 or later (when available). 

For V8.5.0.0 through 8.5.5.20:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH42728
--OR--
· Apply Fix Pack 8.5.5.21 or later (when available).

Vulnerable software versions

IBM WebSphere Application Server: 8.0 - 9.0.5.10

External links

http://www.ibm.com/blogs/psirt/security-bulletin-vulnerability-in-apache-log4j-affects-websphere-application-server-cve-2021-44228/
http://www.ibm.com/support/pages/node/6525706

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?

Yes. This vulnerability is being exploited in the wild.