Security Bulletin: Vulnerability in OpenSSH affects IBM Integrated Analytics System

Security Bulletin

Summary

Redhat provided OpenSSH is used by IBM Integrated Analytics System. This bulletin provides mitigation for the reported CVE.

Vulnerability Details

CVEID: CVE-2019-6109
DESCRIPTION: OpenSSH could allow a remote attacker to conduct spoofing attacks, caused by missing character encoding in the progress display. A man-in-the-middle attacker could exploit this vulnerability to spoof scp client output.
CVSS Base score: 4.2
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/155488 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N)

CVEID: CVE-2019-6111
DESCRIPTION: OpenSSH could allow a remote attacker to overwrite arbitrary files on the system, caused by missing received object name validation by the scp client. The scp implementation accepts arbitrary files sent by the server and a man-in-the-middle attacker could exploit this vulnerability to overwrite unrelated files.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/155486 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N)

CVEID: CVE-2019-6110
DESCRIPTION: OpenSSH could allow a remote attacker to conduct spoofing attacks, caused by accepting and displaying arbitrary stderr output from the scp server. A man-in-the-middle attacker could exploit this vulnerability to spoof scp client output.
CVSS Base score: 3.1
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/155487 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N)

Affected Products and Versions

Affected Product(s)	Version(s)
IBM Integrated Analytics System	1.0.0-1.0.24.0

Remediation/Fixes

None

Workarounds and Mitigations

Mitigation for reported CVE CVE-2019-6109, CVE-2019-6111 and CVE-2019-6110 is as follows:

This security flaw only affects the users of scp binary which is a part of openssh-clients package. The SSH protocol or any other applications shipped as a part of openssh-clients packages are not vulnerable.

We therefore recommends the use of rsync in the place of scp for better security. More details about supported alternatives available at: https://access.redhat.com/articles/5284081

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Acknowledgement

Change History

18 Nov 2020: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location

Worldwide

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Security Bulletin: Vulnerability in OpenSSH affects IBM Integrated Analytics System