# CVE-2023-24068: Missing authorization in n/a

> Attackers with local access can modify cached attachments to inject malicious code, bypassing client validation mechanisms.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 23 Jan 2023
- **Updated:** 22 Aug 2024
- **Also known as:** GHSA-wrv4-jq6j-75pm

## What is CVE-2023-24068?

CVE-2023-24068 is a high-severity missing authorization vulnerability in n/a, published on 23 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Signal Desktop before 6.2.0 on Windows, Linux, and macOS allows an attacker to modify conversation attachments within the attachments.noindex directory. Client mechanisms fail to validate modifications of existing cached files, resulting in an attacker's ability to insert malicious code into pre-existing attachments or replace them completely. A threat actor can forward the existing attachment in the corresponding conversation to external groups, and the name and size of the file will not change, allowing the malware to masquerade as another file. NOTE: the vendor disputes the relevance of this finding because the product is not intended to protect against adversaries with this degree of local access.

## Which versions are affected by CVE-2023-24068?

It affects 1 product.


Products: Signal Signal-Desktop.

## How do I fix CVE-2023-24068?

No fix has been published for CVE-2023-24068 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-24068 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-24068 exists.

## Other vulnerabilities in n/a

- [CVE-2019-19954](https://insights.sbomify.com/CVE-2019-19954/): Privilege escalation in n/a (high 7.3)
- [CVE-2018-11101](https://insights.sbomify.com/CVE-2018-11101/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2018-10994](https://insights.sbomify.com/CVE-2018-10994/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2018-14023](https://insights.sbomify.com/CVE-2018-14023/): Information disclosure in n/a (medium 4.0)
- [CVE-2023-24069](https://insights.sbomify.com/CVE-2023-24069/): Information disclosure in n/a (low 3.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-24068 and fix it if it is affected.

What it is: CVE-2023-24068 is a high-severity missing authorization vulnerability in n/a, published on 23 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-24068 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-2023-24068/ (Markdown: https://insights.sbomify.com/CVE-2023-24068/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-24068
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-24068
- OSV: https://osv.dev/vulnerability/CVE-2023-24068

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-24068/
Summaries are generated and may contain mistakes; the official description above is the record.