---
title: "CVE-2009-1957\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-2009-1957?format=md
keywords: index, follow
---

# CVE-2009-1957

Publication date 8 June 2009

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

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

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## Description

charon/sa/ike\_sa.c in the charon daemon in strongSWAN before 4.3.1 allows
remote attackers to cause a denial of service (NULL pointer dereference and
crash) via an invalid IKE\_SA\_INIT request that triggers "an incomplete
state," followed by a CREATE\_CHILD\_SA request.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| strongswan | 11.10 oneiric | Not affected |
| 11.04 natty | Not affected |
| 10.10 maverick | Not affected |
| 10.04 LTS lucid | Not affected |
| 9.10 karmic | Ignored end of life |
| 9.04 jaunty | Ignored end of life |
| 8.10 intrepid | Ignored end of life, was needs-triage |
| 8.04 LTS hardy | Ignored end of life |
| 6.06 LTS dapper | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2009-1957?format=md#patch-details)

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| strongswan | * Upstream:   <http://download.strongswan.org/patches/03_invalid_ike_state_patch/strongswan-4.x.x_invalid_ike_state.patch> |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1957)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2009-1957)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2009-1957)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2009-1957)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2009-1957>