# CVE-2016-0777: Information disclosure in n/a

> A malicious remote server can exploit the OpenSSH client to read sensitive process memory, potentially exposing private keys.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 14 Jan 2016
- **Updated:** 29 May 2026
- **Also known as:** DEBIAN-CVE-2016-0777, GHSA-9h73-2pqx-3jh8, UBUNTU-CVE-2016-0777

## What is CVE-2016-0777?

CVE-2016-0777 is a medium-severity vulnerability in Apple Mac Os X, published on 14 Jan 2016. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

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.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2016-0777?

It affects 6 products.


Products: Apple Mac Os X, Hp Remote Device Access Virtual Customer Access System, OpenSSH, Oracle Linux, Oracle Solaris, Sophos Unified Threat Management Software.

## How do I fix CVE-2016-0777?

Upgrade to a fixed version.

## Is CVE-2016-0777 being exploited?

There is no known exploitation of CVE-2016-0777 in the wild and no public exploit code.

Public exploit code:

- Professional cybersecurity assessment demonstrating vulnerability identification, CVSS severity scoring, MITRE ATT&CK framework application, and detailed remediation planning for OpenSSH 6.6.1p1 critical vulnerabilities (CVE-2016-0777, CVE-2015-5600) (github_poc): https://github.com/Abdirisaq-ali-aynab/vulnerability-assessment

## Other vulnerabilities in Apple Mac Os X

- [CVE-2014-7169](https://insights.sbomify.com/CVE-2014-7169/): GNU Bourne-Again Shell (Bash) Arbitrary Code Execution (critical 9.8, exploited in the wild)
- [CVE-2014-6271](https://insights.sbomify.com/CVE-2014-6271/): GNU Bourne-Again Shell (Bash) Arbitrary Code Execution (critical 9.8, exploited in the wild)
- [CVE-2012-1823](https://insights.sbomify.com/CVE-2012-1823/): PHP-CGI Query String Parameter (critical 9.8, exploited in the wild)
- [CVE-2021-30713](https://insights.sbomify.com/CVE-2021-30713/): Apple macOS Unspecified (high 7.8, exploited in the wild)
- [CVE-2019-8526](https://insights.sbomify.com/CVE-2019-8526/): Apple macOS Use-After-Free (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-0777 and fix it if it is affected.

What it is: CVE-2016-0777 is a medium-severity vulnerability in Apple Mac Os X, published on 14 Jan 2016. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2016-0777 in the wild and no public exploit code.

Affected product: Apple Mac Os X. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2016-0777/ (Markdown: https://insights.sbomify.com/CVE-2016-0777/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-0777
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-0777
- OSV: https://osv.dev/vulnerability/CVE-2016-0777

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From sbomify Insights: https://insights.sbomify.com/CVE-2016-0777/
Summaries are generated and may contain mistakes; the official description above is the record.