Missing initialization of resource in IBM Java SDK

1) Missing initialization of resource

EUVDB-ID: #VU60084

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-28167

CWE-ID: CWE-909 - Missing initialization of resource

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to usage of the jdk.internal.reflect.ConstantPool API causes the JVM in some cases to pre-resolve certain constant pool entries. This allows a user to call static methods or access static members without running the class initialization method. A remote attacker can send a specially crafted request to the application and observe uninitialized values.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM Java SDK: before 8.0.6.31

External links

http://www.ibm.com/blogs/psirt/security-bulletin-cve-2021-28167-may-affect-ibm-sdk-java-technology-edition/
http://www.ibm.com/support/pages/node/6832432

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.