# CVE-2010-1320: Use after free in n/a

> Remote authenticated users can crash the Kerberos KDC or execute arbitrary code via a double free vulnerability in ticket renewal or validation requests.

- **Severity:** Medium 4.0 (`AV:N/AC:L/Au:S/C:N/I:N/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 22 Apr 2010
- **Updated:** 7 Aug 2024
- **Also known as:** DEBIAN-CVE-2010-1320, GHSA-xrh6-gg74-rf7v

## What is CVE-2010-1320?

CVE-2010-1320 is a medium-severity use after free vulnerability in Mit Kerberos 5, published on 22 Apr 2010. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Double free vulnerability in do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7.x and 1.8.x before 1.8.2 allows remote authenticated users to cause a denial of service (daemon crash) or possibly execute arbitrary code via a request associated with (1) renewal or (2) validation.

Weakness: CWE-399

## Which versions are affected by CVE-2010-1320?

It affects 1 product.


Products: Mit Kerberos 5.

## How do I fix CVE-2010-1320?

Upgrade to a fixed version.

## Is CVE-2010-1320 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2010-1320 exists.

Public exploit code:

- MIT Kerberos 5 - 'src/kdc/do_tgs_req.c' Ticket Renewal Double-Free Memory Corruption (exploitdb)

## Other vulnerabilities in Mit Kerberos 5

- [CVE-2011-0285](https://insights.sbomify.com/CVE-2011-0285/): Use after free in n/a (critical 10.0)
- [CVE-2008-0947](https://insights.sbomify.com/CVE-2008-0947/): Memory corruption in n/a (critical 10.0)
- [CVE-2007-5902](https://insights.sbomify.com/CVE-2007-5902/): Integer overflow in n/a (critical 10.0)
- [CVE-2007-4743](https://insights.sbomify.com/CVE-2007-4743/): Memory corruption in n/a (critical 10.0)
- [CVE-2007-3999](https://insights.sbomify.com/CVE-2007-3999/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2010-1320 and fix it if it is affected.

What it is: CVE-2010-1320 is a medium-severity use after free vulnerability in Mit Kerberos 5, published on 22 Apr 2010. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2010-1320 exists.

Affected product: Mit Kerberos 5. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2010-1320/ (Markdown: https://insights.sbomify.com/CVE-2010-1320/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2010-1320
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2010-1320
- OSV: https://osv.dev/vulnerability/CVE-2010-1320

---
From sbomify Insights: https://insights.sbomify.com/CVE-2010-1320/
Summaries are generated and may contain mistakes; the official description above is the record.