# CVE-2024-34063: Degraded secret zeroization capabilities in vodozemac

> Degraded secret zeroization in vodozemac allows sensitive encryption keys to linger in memory, increasing the risk of data exposure.

- **Severity:** Low 2.5 (`CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N`)
- **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:** Yes
- **Published:** 3 May 2024
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-c3hm-hxwf-g5c6, RUSTSEC-2024-0342

## What is CVE-2024-34063?

CVE-2024-34063 is a low-severity vulnerability in matrix-org vodozemac, published on 3 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

vodozemac is an implementation of Olm and Megolm in pure Rust. Versions 0.5.0 and 0.5.1 of vodozemac have degraded secret zeroization capabilities, due to changes in third-party cryptographic dependencies (the Dalek crates), which moved secret zeroization capabilities behind a feature flag and defaulted this feature to off. The degraded zeroization capabilities could result in the production of more memory copies of encryption secrets and secrets could linger in memory longer than necessary. This marginally increases the risk of sensitive data exposure. This issue has been addressed in version 0.6.0 and users are advised to upgrade. There are no known workarounds for this vulnerability.

Weakness: CWE-1188 (Initialization of a Resource with an Insecure Default)

## Which versions are affected by CVE-2024-34063?

3 open source packages ship an affected version, including vodozemac.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `vodozemac` | crates.io | From 0.5.0 | 0.6.0 |
| `vodozemac` | crates.io | From 0.5.0 | 0.6.0 |
| `vodozemac` | crates.io | From 0.5.0 | 0.6.0 |

## How do I fix CVE-2024-34063?

Upgrade vodozemac to 0.6.0 or later.

## Is CVE-2024-34063 being exploited?

There is no known exploitation of CVE-2024-34063 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-34063 and fix it if it is affected.

What it is: CVE-2024-34063 is a low-severity vulnerability in matrix-org vodozemac, published on 3 May 2024. 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-2024-34063 in the wild and no public exploit code.

Affected packages and fixed versions:
- vodozemac (crates.io): affected from 0.5.0; fixed in 0.6.0
- vodozemac (crates.io): affected from 0.5.0; fixed in 0.6.0
- vodozemac (crates.io): affected from 0.5.0; fixed in 0.6.0

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-2024-34063/ (Markdown: https://insights.sbomify.com/CVE-2024-34063/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-34063
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-34063
- OSV: https://osv.dev/vulnerability/CVE-2024-34063

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-34063/
Summaries are generated and may contain mistakes; the official description above is the record.