# CVE-2024-50383: Information disclosure in n/a

> Compiler optimization flaws in Botan on 32-bit systems may leak cryptographic secrets via timing side-channels in ChaCha-Poly1305 and x25519.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 23 Oct 2024
- **Updated:** 24 Oct 2024
- **Also known as:** AZL-51681, AZL-51701, DEBIAN-CVE-2024-50383, GHSA-m6p4-vhgw-8c9c, MGASA-2025-0295, ROOT-OS-ALPINE-320-CVE-2024-50383, UBUNTU-CVE-2024-50383

## What is CVE-2024-50383?

CVE-2024-50383 is a medium-severity vulnerability in n/a, published on 23 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Botan before 3.6.0, when certain GCC versions are used, has a compiler-induced secret-dependent operation in lib/utils/donna128.h in donna128 (used in Chacha-Poly1305 and x25519). An addition can be skipped if a carry is not set. This was observed for GCC 11.3.0 with -O2 on MIPS, and GCC on x86-i386. (Only 32-bit processors can be affected.)

Weakness: CWE-203 (Observable Discrepancy)

## Which versions are affected by CVE-2024-50383?

It affects 1 product.


Products: Botan Project Botan.

## How do I fix CVE-2024-50383?

Upgrade to a fixed version.

## Is CVE-2024-50383 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-50383 exists.

## Other vulnerabilities in n/a

- [CVE-2021-24115](https://insights.sbomify.com/CVE-2021-24115/): Information disclosure in n/a (critical 9.8)
- [CVE-2018-9127](https://insights.sbomify.com/CVE-2018-9127/): Security feature bypass in n/a (critical 9.8)
- [CVE-2015-7826](https://insights.sbomify.com/CVE-2015-7826/): Security feature bypass in n/a (critical 9.8)
- [CVE-2016-6878](https://insights.sbomify.com/CVE-2016-6878/): Other in n/a (critical 9.8)
- [CVE-2016-9132](https://insights.sbomify.com/CVE-2016-9132/): Integer overflow in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-50383 and fix it if it is affected.

What it is: CVE-2024-50383 is a medium-severity vulnerability in n/a, published on 23 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-50383 exists.

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-2024-50383/ (Markdown: https://insights.sbomify.com/CVE-2024-50383/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-50383
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-50383
- OSV: https://osv.dev/vulnerability/CVE-2024-50383

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-50383/
Summaries are generated and may contain mistakes; the official description above is the record.