# CVE-2001-1319: Denial of service in n/a

> Remote attackers can cause a denial of service in Microsoft Exchange Server by sending malformed LDAP filter encodings.

- **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:** 3 May 2002
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-74fh-48jj-6gqq

## What is CVE-2001-1319?

CVE-2001-1319 is a medium-severity denial of service vulnerability in Microsoft Exchange Server, published on 3 May 2002. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Microsoft Exchange 5.5 2000 allows remote attackers to cause a denial of service (hang) via exceptional BER encodings for the LDAP filter type field, as demonstrated by the PROTOS LDAPv3 test suite.

## Which versions are affected by CVE-2001-1319?

It affects 1 product.


Products: Microsoft Exchange Server.

## How do I fix CVE-2001-1319?

No fix has been published for CVE-2001-1319 yet. Limit exposure of the affected software until one is available.

## Is CVE-2001-1319 being exploited?

There is no known exploitation of CVE-2001-1319 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Exchange Server

- [CVE-2024-21410](https://insights.sbomify.com/CVE-2024-21410/): Microsoft Exchange Server Privilege Escalation (critical 9.8, exploited in the wild)
- [CVE-2021-34473](https://insights.sbomify.com/CVE-2021-34473/): Microsoft Exchange Server Remote Code Execution (critical 9.1, exploited in the wild)
- [CVE-2021-26855](https://insights.sbomify.com/CVE-2021-26855/): Microsoft Exchange Server Remote Code Execution (critical 9.1, exploited in the wild)
- [CVE-2021-34523](https://insights.sbomify.com/CVE-2021-34523/): Microsoft Exchange Server Privilege Escalation (critical 9.0, exploited in the wild)
- [CVE-2023-21529](https://insights.sbomify.com/CVE-2023-21529/): Microsoft Exchange Server Deserialization of Untrusted Data (high 8.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2001-1319 and fix it if it is affected.

What it is: CVE-2001-1319 is a medium-severity denial of service vulnerability in Microsoft Exchange Server, published on 3 May 2002. 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-2001-1319 in the wild and no public exploit code.

Affected product: Microsoft Exchange Server. 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-2001-1319/ (Markdown: https://insights.sbomify.com/CVE-2001-1319/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2001-1319
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2001-1319
- OSV: https://osv.dev/vulnerability/CVE-2001-1319

---
From sbomify Insights: https://insights.sbomify.com/CVE-2001-1319/
Summaries are generated and may contain mistakes; the official description above is the record.