SSH - CVE-2016-0777 Subscribe to Security Advisories

Sunday, July 22, 2018
Sunday, July 22, 2018
Summary 

In January 2016, openssh.org released a security advisory[1] detailing several security issues. The following vulnerabilities that may affect the TLS/SSL management plane of ACOS devices reported in that advisory are addressed in this document.

Item # Vulnerability ID Score Source Score Summary
1 CVE-2016-0777 CVSS 3.0 6.5 Med OpenSSH: Client Information leak due to use of roaming connection feature [2]

Affected Releases

The table below indicates releases of ACOS exposed to these vulnerabilities and ACOS releases that address them. ACOS release families not indicated below are unaffected by these vulnerabilities.

Customers using affected ACOS releases can overcome vulnerability exposures by updating to the indicated resolved release. If the table does not list a corresponding resolved or unaffected release, then no ACOS release update is currently available.

Releases AffectedReleases Resolved or Unaffected

2.8.2 – 2.8.2-P7

4.1.2, 4.1.4

2.7.2 – 2.7.2-P11

4.1.0, 4.1.1, 4.1.2, 4.1.4

2.7.1 – 2.7.1-GR1-Px

4.1.0, 4.1.1, 4.1.2, 4.1.4

2.6.1-GR1 – 2.6.1-GR1-P16

4.1.0, 4.1.1, 4.1.2, 4.1.4

Workarounds and Mitigations 

Common security best practices in the industry for network appliance management and control planes can enhance protection against remote malicious attacks. Limit the exploitable attack surface for critical, infrastructure, networking equipment through the use of access lists or firewall filters to and from only trusted, administrative networks or hosts.

Software Updates 

Software updates that address these vulnerabilities are or will be published at the following URL:
https://www.a10networks.com/support/axseries/software-downloads

Vulnerability Details

The following table shares brief descriptions of the vulnerabilities addressed in this document.

Vulnerability IDVulnerability Description
CVE-2016-0777

The resend_bytes function in roaming_common.c in the client in OpenSSH 5.x, 6.x, and 7.x before 7.1p2 allows remote servers to obtain sensitive information from process memory by requesting transmission of an entire buffer, as demonstrated by reading a private key.

Acknowledgements 

None.

Modification History 
RevisionDateDescription
1.0
July 22, 2018

Initial Publication

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