# CVE-2018-1426: Weak cryptography in DB2 for Linux, UNIX and Windows

> IBM DB2 duplicates PRNG state across fork calls, risking duplicate session IDs and key material, potentially allowing attackers to decrypt data or bypass security.

- **Severity:** High 7.4 (`CVSS:3.0/A:N/AC:H/AV:N/C:H/I:H/PR:N/S:U/UI:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Mar 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-x5r5-q987-6xf6

## What is CVE-2018-1426?

CVE-2018-1426 is a high-severity vulnerability in Ibm Db2, published on 22 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

IBM GSKit (IBM DB2 for Linux, UNIX and Windows 9.7, 10.1, 10.5, and 11.1) duplicates the PRNG state across fork() system calls when multiple ICC instances are loaded which could result in duplicate Session IDs and a risk of duplicate key material. IBM X-Force ID: 139071.

Weakness: CWE-335 (Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG))

## Which versions are affected by CVE-2018-1426?

It affects 1 product.


Products: Ibm Db2.

## How do I fix CVE-2018-1426?

No fix has been published for CVE-2018-1426 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-1426 being exploited?

There is no known exploitation of CVE-2018-1426 in the wild and no public exploit code.

## Other vulnerabilities in Ibm Db2

- [CVE-2012-1797](https://insights.sbomify.com/CVE-2012-1797/): IBM DB2 9.5 uses world-writable permissions for nodes.reg, which has unspecified impact and attack vectors. (critical 10.0)
- [CVE-2010-3731](https://insights.sbomify.com/CVE-2010-3731/): Memory corruption in n/a (critical 10.0)
- [CVE-2010-3193](https://insights.sbomify.com/CVE-2010-3193/): Other in n/a (critical 10.0)
- [CVE-2009-4335](https://insights.sbomify.com/CVE-2009-4335/): Other in n/a (critical 10.0)
- [CVE-2009-3473](https://insights.sbomify.com/CVE-2009-3473/): Missing authorization in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-1426 and fix it if it is affected.

What it is: CVE-2018-1426 is a high-severity vulnerability in Ibm Db2, published on 22 Mar 2018. 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-2018-1426 in the wild and no public exploit code.

Affected product: Ibm Db2. 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-2018-1426/ (Markdown: https://insights.sbomify.com/CVE-2018-1426/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-1426
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-1426
- OSV: https://osv.dev/vulnerability/CVE-2018-1426

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-1426/
Summaries are generated and may contain mistakes; the official description above is the record.