# CVE-2012-4502: Integer overflow in n/a

> Remote attackers can cause a denial of service in Chrony via crafted command requests triggering integer overflows and buffer overflows.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:N/I:N/A:P`)
- **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:** 17 Sep 2024
- **Also known as:** DEBIAN-CVE-2012-4502, GHSA-93mp-m23x-f3x9

## What is CVE-2012-4502?

CVE-2012-4502 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

Multiple integer overflows in pktlength.c in Chrony before 1.29 allow remote attackers to cause a denial of service (crash) via a crafted (1) REQ_SUBNETS_ACCESSED or (2) REQ_CLIENT_ACCESSES command request to the PKL_CommandLength function or crafted (3) RPY_SUBNETS_ACCESSED, (4) RPY_CLIENT_ACCESSES, (5) RPY_CLIENT_ACCESSES_BY_INDEX, or (6) RPY_MANUAL_LIST command reply to the PKL_ReplyLength function, which triggers an out-of-bounds read or buffer overflow.  NOTE: versions 1.27 and 1.28 do not require authentication to exploit.

Weakness: CWE-189

## Which versions are affected by CVE-2012-4502?

It affects 1 product.


Products: Tuxfamily Chrony.

## How do I fix CVE-2012-4502?

Upgrade to a fixed version.

## Is CVE-2012-4502 being exploited?

There is no known exploitation of CVE-2012-4502 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-2012-4503](https://insights.sbomify.com/CVE-2012-4503/): Information disclosure 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-2012-4502 and fix it if it is affected.

What it is: CVE-2012-4502 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-2012-4502 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-2012-4502/ (Markdown: https://insights.sbomify.com/CVE-2012-4502/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2012-4502
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2012-4502
- OSV: https://osv.dev/vulnerability/CVE-2012-4502

---
From sbomify Insights: https://insights.sbomify.com/CVE-2012-4502/
Summaries are generated and may contain mistakes; the official description above is the record.