Vulnerability Monitor

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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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), for affected systems. Impacting 7 products from sophos, from sophos, from oracle and 4 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2016, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2016-01-14T22:59:01.140

Last Modified

2026-05-06T22:30:45.220

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 6.5 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:S/C:P/I:N/A:N

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: SINGLE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: NONE
  • Availability Impact: NONE
Exploitability Score

8.0

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-200
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application sophos unified_threat_management_software 9.318 Yes
Application sophos unified_threat_management_software 9.353 Yes
Hardware sophos unified_threat_management 110 No
Hardware sophos unified_threat_management 120 No
Hardware sophos unified_threat_management 220 No
Hardware sophos unified_threat_management 320 No
Hardware sophos unified_threat_management 425 No
Hardware sophos unified_threat_management 525 No
Hardware sophos unified_threat_management 625 No
Operating System oracle linux 7 Yes
Operating System oracle solaris 11.3 Yes
Application openbsd openssh 5.0 Yes
Application openbsd openssh 5.0 Yes
Application openbsd openssh 5.1 Yes
Application openbsd openssh 5.1 Yes
Application openbsd openssh 5.2 Yes
Application openbsd openssh 5.2 Yes
Application openbsd openssh 5.3 Yes
Application openbsd openssh 5.3 Yes
Application openbsd openssh 5.4 Yes
Application openbsd openssh 5.4 Yes
Application openbsd openssh 5.5 Yes
Application openbsd openssh 5.5 Yes
Application openbsd openssh 5.6 Yes
Application openbsd openssh 5.6 Yes
Application openbsd openssh 5.7 Yes
Application openbsd openssh 5.7 Yes
Application openbsd openssh 5.8 Yes
Application openbsd openssh 5.8 Yes
Application openbsd openssh 5.9 Yes
Application openbsd openssh 5.9 Yes
Application openbsd openssh 6.0 Yes
Application openbsd openssh 6.0 Yes
Application openbsd openssh 6.1 Yes
Application openbsd openssh 6.1 Yes
Application openbsd openssh 6.2 Yes
Application openbsd openssh 6.2 Yes
Application openbsd openssh 6.2 Yes
Application openbsd openssh 6.3 Yes
Application openbsd openssh 6.3 Yes
Application openbsd openssh 6.4 Yes
Application openbsd openssh 6.4 Yes
Application openbsd openssh 6.5 Yes
Application openbsd openssh 6.5 Yes
Application openbsd openssh 6.6 Yes
Application openbsd openssh 6.6 Yes
Application openbsd openssh 6.7 Yes
Application openbsd openssh 6.7 Yes
Application openbsd openssh 6.8 Yes
Application openbsd openssh 6.8 Yes
Application openbsd openssh 6.9 Yes
Application openbsd openssh 6.9 Yes
Application openbsd openssh 7.0 Yes
Application openbsd openssh 7.0 Yes
Application openbsd openssh 7.1 Yes
Application openbsd openssh 7.1 Yes
Application hp remote_device_access_virtual_customer_access_system ≤ 15.07 Yes
Operating System apple mac_os_x ≤ 10.11.3 Yes
References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For sophos's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.