# CVE-2011-0951: Auth bypass in n/a

> Remote attackers can change arbitrary user passwords in Cisco Secure ACS, leading to account takeover and privilege escalation.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:N/I:P/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Apr 2011
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-4wp6-r9gv-37c2

## What is CVE-2011-0951?

CVE-2011-0951 is a medium-severity authentication bypass vulnerability in n/a, published on 1 Apr 2011. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The web-based management interface in Cisco Secure Access Control System (ACS) 5.1 before 5.1.0.44.6 and 5.2 before 5.2.0.26.3 allows remote attackers to change arbitrary user passwords via unspecified vectors, aka Bug ID CSCtl77440.

Weakness: CWE-255

## Which versions are affected by CVE-2011-0951?

It affects 1 product.


Products: Cisco Secure Access Control System.

## How do I fix CVE-2011-0951?

No fix has been published for CVE-2011-0951 yet. Limit exposure of the affected software until one is available.

## Is CVE-2011-0951 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-0951 exists.

Public exploit code:

- Cisco Secure ACS Unauthorized Password Change (metasploit)

## Other vulnerabilities in n/a

- [CVE-2018-0147](https://insights.sbomify.com/CVE-2018-0147/): Cisco Secure Access Control System Java Deserialization (critical 9.8, exploited in the wild)
- [CVE-2014-0648](https://insights.sbomify.com/CVE-2014-0648/): Auth bypass in n/a (critical 10.0)
- [CVE-2014-0650](https://insights.sbomify.com/CVE-2014-0650/): Command injection in n/a (critical 10.0)
- [CVE-2018-0253](https://insights.sbomify.com/CVE-2018-0253/): Command injection in Cisco Secure Access Control System (critical 9.8)
- [CVE-2014-0649](https://insights.sbomify.com/CVE-2014-0649/): Privilege escalation in n/a (critical 9.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-0951 and fix it if it is affected.

What it is: CVE-2011-0951 is a medium-severity authentication bypass vulnerability in n/a, published on 1 Apr 2011. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-0951 exists.

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-2011-0951/ (Markdown: https://insights.sbomify.com/CVE-2011-0951/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-0951
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-0951
- OSV: https://osv.dev/vulnerability/CVE-2011-0951

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From sbomify Insights: https://insights.sbomify.com/CVE-2011-0951/
Summaries are generated and may contain mistakes; the official description above is the record.