Security Bulletin
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.
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References
Acknowledgement
Reported to IBM by Karthikeyan Bhargavan at INRIA in Paris, France
Change History
January 27 2015: Original Copy Published
*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.
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Document Information
Modified date:
17 June 2018
UID
swg21974931