# CVE-2012-4503: Information disclosure in n/a

> Remote attackers can read sensitive stack memory via malformed Chrony commands, potentially exposing internal data without authentication.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:P/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 5 Nov 2013
- **Updated:** 16 Sep 2024
- **Also known as:** DEBIAN-CVE-2012-4503, GHSA-53c9-c34f-h6w7

## What is CVE-2012-4503?

CVE-2012-4503 is a medium-severity vulnerability in n/a, published on 5 Nov 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

cmdmon.c in Chrony before 1.29 allows remote attackers to obtain potentially sensitive information from stack memory via vectors related to (1) an invalid subnet in a RPY_SUBNETS_ACCESSED command to the handle_subnets_accessed function or (2) a RPY_CLIENT_ACCESSES command to the handle_client_accesses function when client logging is disabled, which causes uninitialized data to be included in a reply.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2012-4503?

It affects 1 product.


Products: Tuxfamily Chrony.

## How do I fix CVE-2012-4503?

Upgrade to a fixed version.

## Is CVE-2012-4503 being exploited?

There is no known exploitation of CVE-2012-4503 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2016-1567](https://insights.sbomify.com/CVE-2016-1567/): Auth bypass in n/a (high 8.1)
- [CVE-2015-1853](https://insights.sbomify.com/CVE-2015-1853/): Denial of service in chrony (medium 6.5)
- [CVE-2012-4502](https://insights.sbomify.com/CVE-2012-4502/): Integer overflow in n/a (medium 5.0)
- [CVE-2010-0292](https://insights.sbomify.com/CVE-2010-0292/): Denial of service in n/a (medium 5.0)
- [CVE-2010-0293](https://insights.sbomify.com/CVE-2010-0293/): Denial of service in n/a (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2012-4503 and fix it if it is affected.

What it is: CVE-2012-4503 is a medium-severity vulnerability in n/a, published on 5 Nov 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2012-4503 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-2012-4503/ (Markdown: https://insights.sbomify.com/CVE-2012-4503/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2012-4503
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2012-4503
- OSV: https://osv.dev/vulnerability/CVE-2012-4503

---
From sbomify Insights: https://insights.sbomify.com/CVE-2012-4503/
Summaries are generated and may contain mistakes; the official description above is the record.