Security Bulletin: Vulnerabilities in OpenSSH affect IBM MessageSight (CVE-2016-0777, CVE-2016-0778)

Summary

An information leak flaw and buffer overflow flaw in the way the OpenSSH client roaming feature was implemented affects IBM MessageSight.

Vulnerability Details

CVEID: CVE-2016-0777

DESCRIPTION: OpenSSH could allow a remote attacker to obtain sensitive information, caused by a client information leak from using the roaming connection feature. By persuading a victim to connect to a malicious server, an attacker could exploit this vulnerability to retrieve private cryptographic keys or other sensitive information.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/109635 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N)

CVEID: CVE-2016-0778

DESCRIPTION: OpenSSH is vulnerable to a heap-based buffer overflow, caused by improper bounds checking by the packet_write_wait() and ssh_packet_write_wait() API functions when two non-default options: a ProxyCommand and either ForwardAgent or ForwardX11 are used. By persuading a victim to connect to a malicious server, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
CVSS Base Score: 5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/109636 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L)

Affected Products and Versions

IBM MessageSight 1.2.0.3 and below

Remediation/Fixes

Product

|
VRMF|
APAR|
Remediation/First Fix
—|—|—|—
IBM MessageSight| 1.1| IT13410| 1.1.0.1-IBM-IMA-IFIT13410

IBM MessageSight|
1.2|
IT13392|
1.2.0.3-IBM-IMA-IFIT13392

After applying fix, IBM recommends that you regenerate your SSH keys as a precaution.