---
title: "CVE-2012-1015\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-2012-1015?format=md
keywords: index, follow
---

# CVE-2012-1015

Publication date 31 July 2012

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

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

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## Description

The kdc\_handle\_protected\_negotiation function in the Key Distribution
Center (KDC) in MIT Kerberos 5 (aka krb5) 1.8.x, 1.9.x before 1.9.5, and
1.10.x before 1.10.3 attempts to calculate a checksum before verifying that
the key type is appropriate for a checksum, which allows remote attackers
to execute arbitrary code or cause a denial of service (uninitialized
pointer free, heap memory corruption, and daemon crash) via a crafted
AS-REQ request.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2012-1015?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| krb5 | 12.04 LTS precise | Fixed 1.10+dfsg~beta1-2ubuntu0.3 |
| 11.10 oneiric | Fixed 1.9.1+dfsg-1ubuntu2.3 |
| 11.04 natty | Fixed 1.8.3+dfsg-5ubuntu2.3 |
| 10.04 LTS lucid | Fixed 1.8.1+dfsg-2ubuntu0.11 |
| 8.04 LTS hardy | Not affected |

---

* [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-2012-1015?format=md#patch-details)

## Notes

---

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

krb5 1.8 and newer
code execution potential probably blocked by glibc
double-free detection

### 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 |
| --- | --- |
| krb5 | * Upstream:   <http://web.mit.edu/kerberos/advisories/2012-001-patch.txt> |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-1015)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2012-1015)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2012-1015)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2012-1015)

### Related Ubuntu Security Notices (USN)

+ [USN-1520-1](https://usn.ubuntu.com/USN-1520-1)
+ Kerberos vulnerabilities
+ 31 July 2012

### Other references

* <http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2012-001.txt>
* <https://www.cve.org/CVERecord?id=CVE-2012-1015>