---
title: "CVE-2011-4597\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-2011-4597?format=md
keywords: index, follow
---

# CVE-2011-4597

Publication date 15 December 2011

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

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

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## Description

The SIP over UDP implementation in Asterisk Open Source 1.4.x before
1.4.43, 1.6.x before 1.6.2.21, and 1.8.x before 1.8.7.2 uses different port
numbers for responses to invalid requests depending on whether a SIP
username exists, which allows remote attackers to enumerate usernames via a
series of requests.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2011-4597?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| asterisk | 13.10 saucy | Not affected |
| 13.04 raring | Not affected |
| 12.10 quantal | Not affected |
| 12.04 LTS precise | Not affected |
| 11.10 oneiric | Ignored end of life |
| 11.04 natty | Ignored end of life |
| 10.10 maverick | Ignored end of life |
| 10.04 LTS lucid | Ignored end of life |
| 8.04 LTS hardy | Ignored end of life |

---

* [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-2011-4597?format=md#patch-details)

## Notes

---

### [jdstrand](https://launchpad.net/~jdstrand)

per upstream, no fix issued, only a documentation change. Upstream
releases contain these documentation updates

### 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 |
| --- | --- |
| asterisk | * Vendor:   <http://www.debian.org/security/2011/dsa-2367> |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4597)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2011-4597)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2011-4597)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2011-4597)

### Other references

* <http://downloads.asterisk.org/pub/security/AST-2011-013.html>
* <http://lists.digium.com/pipermail/asterisk-dev/2011-November/052191.html>
* <https://www.cve.org/CVERecord?id=CVE-2011-4597>