Security Bulletin: A vulnerability in libssh2 affects IBM Security Network Protection (CVE-2016-0787)

Security Bulletin

Summary

The libssh2 packages provide a library that implements the SSHv2 protocol. A security vulnerability has been discovered in libssh2 used with IBM Security Network Protection.

Vulnerability Details

CVEID: CVE-2016-0787
DESCRIPTION: libssh2 could provide weaker than expected security, caused by a type confusion error during the SSHv2 handshake resulting in the generation of a reduced amount of random bits for Diffie-Hellman. An attacker could exploit this vulnerability using the truncated Diffie-Hellman secret to launch further attacks on the system.
CVSS Base Score: 6.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/111562 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)

Affected Products and Versions

IBM Security Network Protection 5.3.1
IBM Security Network Protection 5.3.2

Remediation/Fixes

Product	VRMF	Remediation/First Fix
IBM Security Network Protection	Firmware version 5.3.1	Download Firmware 5.3.1.9 from IBM Security License Key and Download Center and upload and install via the Available Updates page of the Local Management Interface.
IBM Security Network Protection	Firmware version 5.3.2	Install Firmware 5.3.2.3 from the Available Updates page of the Local Management Interface, or by performing a One Time Scheduled Installation from SiteProtector.

Workarounds and Mitigations

None

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References

Complete CVSS v2 Guide
On-line Calculator v2

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

30 May 2016: Original Version 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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Tips

Security Bulletin: A vulnerability in libssh2 affects IBM Security Network Protection (CVE-2016-0787)