---
title: "CVE-2011-2192\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-2011-2192?format=md
keywords: index, follow
---

# CVE-2011-2192

Publication date 23 June 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 Curl\_input\_negotiate function in http\_negotiate.c in libcurl 7.10.6
through 7.21.6, as used in curl and other products, always performs
credential delegation during GSSAPI authentication, which allows remote
servers to impersonate clients via GSSAPI requests.

### From the Ubuntu Security Team

Richard Silverman discovered that when doing GSSAPI authentication,
libcurl unconditionally performs credential delegation, handing the
server a copy of the client's security credential. (CVE-2011-2192)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| curl | 11.04 natty | Fixed 7.21.3-1ubuntu1.2 |
| 10.10 maverick | Fixed 7.21.0-1ubuntu1.1 |
| 10.04 LTS lucid | Fixed 7.19.7-1ubuntu1.1 |
| 8.04 LTS hardy | Fixed 7.18.0-1ubuntu2.3 |

---

* [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-2011-2192?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 |
| --- | --- |
| curl | * Upstream:   <http://curl.haxx.se/curl-gssapi-delegation.patch> |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2192)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2011-2192)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2011-2192)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2011-2192)

### Related Ubuntu Security Notices (USN)

+ [USN-1158-1](https://usn.ubuntu.com/USN-1158-1)
+ curl vulnerabilities
+ 24 June 2011

### Other references

* <http://curl.haxx.se/docs/adv_20110623.html>
* <https://www.cve.org/CVERecord?id=CVE-2011-2192>