# CVE-2001-0929: Auth bypass in n/a

> Remote attackers can bypass access control lists in Cisco IOS Firewall due to improper IP protocol type checking.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/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:** 25 Jun 2002
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-c9cp-qwv7-4m5r

## What is CVE-2001-0929?

CVE-2001-0929 is a high-severity authentication bypass vulnerability in Cisco Ios, published on 25 Jun 2002. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Cisco IOS Firewall Feature set, aka Context Based Access Control (CBAC) or Cisco Secure Integrated Software, for IOS 11.2P through 12.2T does not properly check the IP protocol type, which could allow remote attackers to bypass access control lists.

## Which versions are affected by CVE-2001-0929?

It affects 1 product.


Products: Cisco Ios.

## How do I fix CVE-2001-0929?

No fix has been published for CVE-2001-0929 yet. Limit exposure of the affected software until one is available.

## Is CVE-2001-0929 being exploited?

There is no known exploitation of CVE-2001-0929 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Ios

- [CVE-2017-12240](https://insights.sbomify.com/CVE-2017-12240/): Cisco IOS and IOS XE Software DHCP Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2017-3881](https://insights.sbomify.com/CVE-2017-3881/): Cisco IOS and IOS XE Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2018-0167](https://insights.sbomify.com/CVE-2018-0167/): Cisco IOS, XR, and XE Software Buffer Overflow (high 8.8, exploited in the wild)
- [CVE-2017-6736](https://insights.sbomify.com/CVE-2017-6736/): Cisco IOS and IOS XE Software SNMP Remote Code Execution (high 8.8, exploited in the wild)
- [CVE-2017-6737](https://insights.sbomify.com/CVE-2017-6737/): Cisco IOS and IOS XE Software SNMP Remote Code Execution (high 8.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2001-0929 and fix it if it is affected.

What it is: CVE-2001-0929 is a high-severity authentication bypass vulnerability in Cisco Ios, published on 25 Jun 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-2001-0929 in the wild and no public exploit code.

Affected product: Cisco Ios. 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-2001-0929/ (Markdown: https://insights.sbomify.com/CVE-2001-0929/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2001-0929
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2001-0929
- OSV: https://osv.dev/vulnerability/CVE-2001-0929

---
From sbomify Insights: https://insights.sbomify.com/CVE-2001-0929/
Summaries are generated and may contain mistakes; the official description above is the record.