# CVE-2013-1302: Use after free in n/a

> Remote attackers can execute arbitrary code via a crafted invitation triggering a use-after-free in Microsoft Lync clients.

- **Severity:** Critical 9.3 (`AV:N/AC:M/Au:N/C:C/I:C/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 May 2013
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-q433-fx96-3j76

## What is CVE-2013-1302?

CVE-2013-1302 is a critical use after free vulnerability in n/a, published on 15 May 2013. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Microsoft Communicator 2007 R2, Lync 2010, Lync 2010 Attendee, and Lync Server 2013 do not properly handle objects in memory, which allows remote attackers to execute arbitrary code via an invitation that triggers access to a deleted object, aka "Lync RCE Vulnerability."

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2013-1302?

It affects 3 products.


Products: Microsoft Lync, Microsoft Lync Server, Microsoft Office Communicator.

## How do I fix CVE-2013-1302?

No fix has been published for CVE-2013-1302 yet. Limit exposure of the affected software until one is available.

## Is CVE-2013-1302 being exploited?

There is no known exploitation of CVE-2013-1302 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-1025](https://insights.sbomify.com/CVE-2020-1025/): Microsoft Office Elevation of Privilege Vulnerability (critical 9.8)
- [CVE-2012-1849](https://insights.sbomify.com/CVE-2012-1849/): Path traversal in n/a (critical 9.3)
- [CVE-2018-8311](https://insights.sbomify.com/CVE-2018-8311/): Code injection in Microsoft Lync (high 8.8)
- [CVE-2017-11786](https://insights.sbomify.com/CVE-2017-11786/): Auth bypass in Skype for Business (high 8.8)
- [CVE-2017-0283](https://insights.sbomify.com/CVE-2017-0283/): Memory corruption in Uniscribe (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-1302 and fix it if it is affected.

What it is: CVE-2013-1302 is a critical use after free vulnerability in n/a, published on 15 May 2013. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2013-1302 in the wild and no public exploit code.

Affected product: n/a. 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-2013-1302/ (Markdown: https://insights.sbomify.com/CVE-2013-1302/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-1302
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-1302
- OSV: https://osv.dev/vulnerability/CVE-2013-1302

---
From sbomify Insights: https://insights.sbomify.com/CVE-2013-1302/
Summaries are generated and may contain mistakes; the official description above is the record.