---
title: "CVE-2011-1924\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-2011-1924?format=md
keywords: index, follow
---

# CVE-2011-1924

Publication date 14 June 2011

Last updated 24 July 2024

---

Ubuntu priority

**Low**

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

Toggle side navigation

## Description

Buffer overflow in the policy\_summarize function in or/policies.c in Tor
before 0.2.1.30 allows remote attackers to cause a denial of service
(directory authority crash) via a crafted policy that triggers creation of
a long port list.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| tor | 11.10 oneiric | Not affected |
| 11.04 natty | Not affected |
| 10.10 maverick | Not in release |
| 10.04 LTS lucid | Not in release |
| 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-2011-1924?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 |
| --- | --- |
| tor | * Upstream:   [43414eb](https://gitweb.torproject.org/tor.git/commit/43414eb98821d3b5c6c65181d7545ce938f82c8e) |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1924)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2011-1924)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2011-1924)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2011-1924)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2011-1924>