# CVE-2024-56370: Net::Xero 0.044 and earlier for Perl uses insecure rand() function for cryptographic functions

> The Net::Xero Perl library uses insecure random number generation for cryptographic functions, potentially allowing attackers to predict tokens or keys.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Apr 2025
- **Updated:** 5 Sep 2025
- **Also known as:** GHSA-h236-32wj-mg7x

## What is CVE-2024-56370?

CVE-2024-56370 is a medium-severity vulnerability in ELLIOTT Net::Xero, published on 5 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Net::Xero 0.044 and earlier for Perl uses the rand() function as the default source of entropy, which is not cryptographically secure, for cryptographic functions.

Specifically Net::Xero uses the Data::Random library which specifically states that it is "Useful mostly for test programs". Data::Random uses the rand() function.

Weakness: CWE-338 (Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)), CWE-331 (Insufficient Entropy)

## Which versions are affected by CVE-2024-56370?


## How do I fix CVE-2024-56370?

No fix has been published for CVE-2024-56370 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-56370 being exploited?

There is no known exploitation of CVE-2024-56370 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-56370 and fix it if it is affected.

What it is: CVE-2024-56370 is a medium-severity vulnerability in ELLIOTT Net::Xero, published on 5 Apr 2025. 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-2024-56370 in the wild and no public exploit code.

Affected product: ELLIOTT Net::Xero. 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-2024-56370/ (Markdown: https://insights.sbomify.com/CVE-2024-56370/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-56370
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-56370
- OSV: https://osv.dev/vulnerability/CVE-2024-56370

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-56370/
Summaries are generated and may contain mistakes; the official description above is the record.