# CVE-2015-0121: Auth bypass in n/a

> Attackers can hijack sessions on unattended workstations when LTPA SSO is enabled, gaining unauthorized access to IBM Requirements Composer and RDNG.

- **Severity:** Low 3.7 (`AV:L/AC:H/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 30 May 2015
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-c9cr-fjpc-6g3v

## What is CVE-2015-0121?

CVE-2015-0121 is a low-severity authentication bypass vulnerability in Ibm Rational Doors Next Generation, published on 30 May 2015. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

IBM Rational Requirements Composer 3.0 through 3.0.1.6 and 4.0 through 4.0.7 and Rational DOORS Next Generation (RDNG) 4.0 through 4.0.7 and 5.0 through 5.0.2, when LTPA single sign on is used with WebSphere Application Server, do not terminate a Requirements Management (RM) session upon LTPA token expiration, which allows remote attackers to obtain access by leveraging an unattended workstation.

## Which versions are affected by CVE-2015-0121?

It affects 2 products.


Products: Ibm Rational Doors Next Generation, Ibm Rational Requirements Composer.

## How do I fix CVE-2015-0121?

No fix has been published for CVE-2015-0121 yet. Limit exposure of the affected software until one is available.

## Is CVE-2015-0121 being exploited?

There is no known exploitation of CVE-2015-0121 in the wild and no public exploit code.

## Other vulnerabilities in Ibm Rational Doors Next Generation

- [CVE-2015-0132](https://insights.sbomify.com/CVE-2015-0132/): Denial of service in n/a (high 7.8)
- [CVE-2018-1911](https://insights.sbomify.com/CVE-2018-1911/): Cross-site scripting in Rational DOORS Next Generation (medium 5.4)
- [CVE-2018-1912](https://insights.sbomify.com/CVE-2018-1912/): Cross-site scripting in Rational DOORS Next Generation (medium 5.4)
- [CVE-2018-1610](https://insights.sbomify.com/CVE-2018-1610/): Cross-site scripting in Rational DOORS Next Generation (medium 5.4)
- [CVE-2017-1753](https://insights.sbomify.com/CVE-2017-1753/): Cross-site scripting in Rational Collaborative Lifecycle Management (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-0121 and fix it if it is affected.

What it is: CVE-2015-0121 is a low-severity authentication bypass vulnerability in Ibm Rational Doors Next Generation, published on 30 May 2015. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2015-0121 in the wild and no public exploit code.

Affected product: Ibm Rational Doors Next Generation. 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-2015-0121/ (Markdown: https://insights.sbomify.com/CVE-2015-0121/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-0121
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-0121
- OSV: https://osv.dev/vulnerability/CVE-2015-0121

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-0121/
Summaries are generated and may contain mistakes; the official description above is the record.