# CVE-2009-1135: Auth bypass in n/a

> Remote attackers can bypass authentication and gain arbitrary account privileges to access published web pages when Radius OTP is enabled.

- **Severity:** Critical 9.0 (`AV:N/AC:L/Au:S/C:C/I:C/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Jul 2009
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-r622-f8m7-c595

## What is CVE-2009-1135?

CVE-2009-1135 is a critical authentication bypass vulnerability in n/a, published on 15 Jul 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Microsoft Internet Security and Acceleration (ISA) Server 2006 Gold and SP1, when Radius OTP is enabled, uses the HTTP-Basic authentication method, which allows remote attackers to gain the privileges of an arbitrary account, and access published web pages, via vectors involving attempted access to a network resource behind the ISA Server, aka "Radius OTP Bypass Vulnerability."

Weakness: CWE-264

## Which versions are affected by CVE-2009-1135?

It affects 1 product.


Products: Microsoft Isa Server.

## How do I fix CVE-2009-1135?

No fix has been published for CVE-2009-1135 yet. Limit exposure of the affected software until one is available.

## Is CVE-2009-1135 being exploited?

There is no known exploitation of CVE-2009-1135 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2006-7027](https://insights.sbomify.com/CVE-2006-7027/): Microsoft Internet Security and Acceleration (ISA) Server 2004 logs unusual ASCII characters in the Host header, including the tab, which al (critical 10.0)
- [CVE-2009-0562](https://insights.sbomify.com/CVE-2009-0562/): Memory corruption in n/a (critical 9.3)
- [CVE-2009-1534](https://insights.sbomify.com/CVE-2009-1534/): Memory corruption in n/a (critical 9.3)
- [CVE-2009-1136](https://insights.sbomify.com/CVE-2009-1136/): Code injection in n/a (critical 9.3)
- [CVE-2006-3652](https://insights.sbomify.com/CVE-2006-3652/): Security feature bypass in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2009-1135 and fix it if it is affected.

What it is: CVE-2009-1135 is a critical authentication bypass vulnerability in n/a, published on 15 Jul 2009. 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-2009-1135 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-2009-1135/ (Markdown: https://insights.sbomify.com/CVE-2009-1135/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-1135
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-1135
- OSV: https://osv.dev/vulnerability/CVE-2009-1135

---
From sbomify Insights: https://insights.sbomify.com/CVE-2009-1135/
Summaries are generated and may contain mistakes; the official description above is the record.