# CVE-2016-1907: Denial of service in n/a

> Remote attackers can crash the OpenSSH server via crafted network traffic, causing a denial of service.

- **Severity:** Medium 5.3 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 19 Jan 2016
- **Updated:** 5 Aug 2024
- **Also known as:** ALPINE-CVE-2016-1907, DEBIAN-CVE-2016-1907, GHSA-3xwc-hv27-5fhw

## What is CVE-2016-1907?

CVE-2016-1907 is a medium-severity denial of service vulnerability in OpenSSH, published on 19 Jan 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The ssh_packet_read_poll2 function in packet.c in OpenSSH before 7.1p2 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via crafted network traffic.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2016-1907?

It affects 1 product.


Products: OpenSSH.

## How do I fix CVE-2016-1907?

Upgrade to a fixed version.

## Is CVE-2016-1907 being exploited?

There is no known exploitation of CVE-2016-1907 in the wild and no public exploit code.

## Other vulnerabilities in OpenSSH

- [CVE-2003-0786](https://insights.sbomify.com/CVE-2003-0786/): Auth bypass in n/a (critical 10.0)
- [CVE-2003-0693](https://insights.sbomify.com/CVE-2003-0693/): Memory corruption in n/a (critical 10.0)
- [CVE-2002-0640](https://insights.sbomify.com/CVE-2002-0640/): Memory corruption in n/a (critical 10.0)
- [CVE-2001-0144](https://insights.sbomify.com/CVE-2001-0144/): Integer overflow in n/a (critical 10.0)
- [CVE-2000-0999](https://insights.sbomify.com/CVE-2000-0999/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-1907 and fix it if it is affected.

What it is: CVE-2016-1907 is a medium-severity denial of service vulnerability in OpenSSH, published on 19 Jan 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2016-1907 in the wild and no public exploit code.

Affected product: OpenSSH. 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-2016-1907/ (Markdown: https://insights.sbomify.com/CVE-2016-1907/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-1907
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-1907
- OSV: https://osv.dev/vulnerability/CVE-2016-1907

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-1907/
Summaries are generated and may contain mistakes; the official description above is the record.