# CVE-2012-1821: Denial of service in n/a

> Remote attackers can cause denial of service in Symantec Endpoint Protection Manager by flooding packets to trigger automated blocking.

- **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:** No
- **Published:** 24 May 2012
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-3wf6-phm6-xcr4

## What is CVE-2012-1821?

CVE-2012-1821 is a medium-severity denial of service vulnerability in Symantec Endpoint Protection, published on 24 May 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Network Threat Protection module in the Manager component in Symantec Endpoint Protection (SEP) 11.0.600x through 11.0.700x on Windows Server 2003 allows remote attackers to cause a denial of service (web-server outage, or daemon crash or hang) via a flood of packets that triggers automated blocking of network traffic.

## Which versions are affected by CVE-2012-1821?

It affects 1 product.


Products: Symantec Endpoint Protection.

## How do I fix CVE-2012-1821?

No fix has been published for CVE-2012-1821 yet. Limit exposure of the affected software until one is available.

## Is CVE-2012-1821 being exploited?

There is no known exploitation of CVE-2012-1821 in the wild and no public exploit code.

## Other vulnerabilities in Symantec Endpoint Protection

- [CVE-2012-0295](https://insights.sbomify.com/CVE-2012-0295/): Code injection in n/a (critical 9.3)
- [CVE-2018-5237](https://insights.sbomify.com/CVE-2018-5237/): Privilege escalation in Symantec Endpoint Protection (high 8.8)
- [CVE-2020-5836](https://insights.sbomify.com/CVE-2020-5836/): Privilege escalation in Symantec Endpoint Protection (high 7.8)
- [CVE-2020-5837](https://insights.sbomify.com/CVE-2020-5837/): Path traversal in Symantec Endpoint Protection (high 7.8)
- [CVE-2020-5820](https://insights.sbomify.com/CVE-2020-5820/): Privilege escalation in Symantec Endpoint Protection (SEP) and Symantec Endpoint Protection Small Business Edition (SEP SBE) (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2012-1821 and fix it if it is affected.

What it is: CVE-2012-1821 is a medium-severity denial of service vulnerability in Symantec Endpoint Protection, published on 24 May 2012. 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-2012-1821 in the wild and no public exploit code.

Affected product: Symantec Endpoint Protection. 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-2012-1821/ (Markdown: https://insights.sbomify.com/CVE-2012-1821/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2012-1821
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2012-1821
- OSV: https://osv.dev/vulnerability/CVE-2012-1821

---
From sbomify Insights: https://insights.sbomify.com/CVE-2012-1821/
Summaries are generated and may contain mistakes; the official description above is the record.