# CVE-2018-1842: Auth bypass in Cognos Analytics

> Attackers can bypass OIDC signature verification in IBM Cognos Analytics to gain unauthorized access under specific configuration conditions.

- **Severity:** Low 3.6 (`CVSS:3.0/A:N/AC:H/AV:L/C:L/I:L/PR:L/S:U/UI:N/E:U/RC:C/RL:O`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Nov 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-72r8-vmj4-cfrp

## What is CVE-2018-1842?

CVE-2018-1842 is a low-severity authentication bypass vulnerability in Ibm Cognos Analytics, published on 9 Nov 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

IBM Cognos Analytics 11 Configuration tool, under certain circumstances, will bypass OIDC namespace signature verification on its id_token. IBM X-Force ID: 150902.

Weakness: CWE-347 (Improper Verification of Cryptographic Signature)

## Which versions are affected by CVE-2018-1842?

It affects 2 products.


Products: Ibm Cognos Analytics, Netapp Oncommand Insight.

## How do I fix CVE-2018-1842?

No fix has been published for CVE-2018-1842 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-1842 being exploited?

There is no known exploitation of CVE-2018-1842 in the wild and no public exploit code.

## Other vulnerabilities in Ibm Cognos Analytics

- [CVE-2020-4561](https://insights.sbomify.com/CVE-2020-4561/): Missing authorization in Cognos Analytics (critical 10.0)
- [CVE-2024-51466](https://insights.sbomify.com/CVE-2024-51466/): IBM Cognos Analytics expression language injection (critical 9.0)
- [CVE-2021-29679](https://insights.sbomify.com/CVE-2021-29679/): Code injection in Cognos Analytics (high 8.8)
- [CVE-2024-25047](https://insights.sbomify.com/CVE-2024-25047/): IBM Cognos Analytics log injection (high 8.6)
- [CVE-2018-1721](https://insights.sbomify.com/CVE-2018-1721/): IBM Cognos Analytics 11.0 and 11.1 is vulnerable to a XML External Entity Injection (XXE) attack when processing XML data. (high 8.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-1842 and fix it if it is affected.

What it is: CVE-2018-1842 is a low-severity authentication bypass vulnerability in Ibm Cognos Analytics, published on 9 Nov 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-1842 in the wild and no public exploit code.

Affected product: Ibm Cognos Analytics. 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-2018-1842/ (Markdown: https://insights.sbomify.com/CVE-2018-1842/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-1842
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-1842
- OSV: https://osv.dev/vulnerability/CVE-2018-1842

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-1842/
Summaries are generated and may contain mistakes; the official description above is the record.