CVE-2006-4925 Null dereference in n/a
Medium 5.0
Published
Updated
Check this codebase for CVE-2006-4925 and fix it if it is affected.
What it is: CVE-2006-4925 is a medium-severity vulnerability in OpenSSH, published on 29 Sep 2006. 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-2006-4925 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-2006-4925/ (Markdown: https://insights.sbomify.com/CVE-2006-4925/index.md)
Remote attackers can crash the OpenSSH server by sending a malformed protocol sequence, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2006-4925?
CVE-2006-4925 is a medium-severity vulnerability in OpenSSH, published on 29 Sep 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
packet.c in ssh in OpenSSH allows remote attackers to cause a denial of service (crash) by sending an invalid protocol sequence with USERAUTH_SUCCESS before NEWKEYS, which causes newkeys[mode] to be NULL.
Which versions are affected by CVE-2006-4925?
It affects 1 product.
Products include OpenSSH.
How do I fix CVE-2006-4925?
Upgrade to a fixed version.
Is CVE-2006-4925 being exploited?
There is no known exploitation of CVE-2006-4925 in the wild and no public exploit code.
Other vulnerabilities in OpenSSH
Sources
Also known as DEBIAN-CVE-2006-4925, GHSA-c5hw-qx35-fpg2.