Imprope rinput validation in IBM Rational Directory Server

1) Improper input validation

EUVDB-ID: #VU57495

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-35578

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The vulnerability exists due to improper input validation within the JSSE component in Oracle GraalVM Enterprise Edition when processing TLS 1.3 ClientHello packets. A remote non-authenticated attacker can exploit this vulnerability to perform service disruption.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM Rational Directory Server (RDS): All versions

CPE2.3

• cpe:2.3:a:ibm_corporation:ibm_rational_directory_server_rds:*:*:*:*:*:*:*:*

External links

https://www.ibm.com/blogs/psirt/security-bulletin-multiple-vulnerabilities-in-ibm-java-runtime-affect-rational-directory-server-tivoli-rational-directory-administrator-10/
https://www.ibm.com/support/pages/node/6537318

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.