Security Bulletin: IBM App Connect Enterprise is vulnerable to a machine-in-the-middle attack due to OpenSSH (CVE-2023-48795)

Summary

IBM App Connect Enterprise File Nodes configured to connect to OpenSSH servers using SFTP are vulnerable to a machine-in-the-middle attack due to OpenSSH. This bulletin identifies the steps to take to address the vulnerability.

Vulnerability Details

CVEID:CVE-2023-48795
**DESCRIPTION:**OpenSSH is vulnerable to a machine-in-the-middle attack, caused by a flaw in the extension negotiation process in the SSH transport protocol when used with certain OpenSSH extensions. A remote attacker could exploit this vulnerability to launch a machine-in-the-middle attack and strip an arbitrary number of messages after the initial key exchange, breaking SSH extension negotiation and downgrading the client connection security.
CVSS Base score: 5.9
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/275282 for the current score.
CVSS Vector: (CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N)

Affected Products and Versions

Remediation/Fixes

IBM strongly recommends addressing the vulnerability/vulnerabilities now by applying the appropriate fix to IBM App Connect Enterprise

Affected Product(s)

|

Version(s)

| APAR|

Remediation / Fixes

—|—|—|—
IBM App Connect Enterprise| 12.0.1.0 - 12.0.12.0| IT45875|

The APAR (IT45875) is available from

IBM App Connect Enterprise v12- Fix Pack Release 12.0.12.1

Workarounds and Mitigations

None