---
title: "CVE-2006-4924\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2006-4924?format=md
keywords: index, follow
---

# CVE-2006-4924

Publication date 27 September 2006

Last updated 17 July 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

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## Description

sshd in OpenSSH before 4.4, when using the version 1 SSH protocol, allows
remote attackers to cause a denial of service (CPU consumption) via an SSH
packet that contains duplicate blocks, which is not properly handled by the
CRC compensation attack detector.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| openssh | 7.04 feisty | Fixed 4.3p2-5ubuntu1 |
| 6.10 edgy | Fixed 4.3p2-5ubuntu1 |
| 6.06 LTS dapper | Fixed 4.2p1-7ubuntu3.1 |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4924)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2006-4924)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2006-4924)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2006-4924)

### Related Ubuntu Security Notices (USN)

+ [USN-355-1](https://usn.ubuntu.com/USN-355-1)
+ openssh vulnerabilities
+ 2 October 2006

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2006-4924>