# CVE-2021-23827: Information disclosure in n/a

> Local attackers can access sensitive cached media files in Keybase Desktop Client due to improper cache clearing mechanisms.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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:** No
- **Published:** 22 Feb 2021
- **Updated:** 3 Aug 2024

## What is CVE-2021-23827?

CVE-2021-23827 is a medium-severity vulnerability in n/a, published on 22 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Keybase Desktop Client before 5.6.0 on Windows and macOS, and before 5.6.1 on Linux, allows an attacker to obtain potentially sensitive media (such as private pictures) in the Cache and uploadtemps directories. It fails to effectively clear cached pictures, even after deletion via normal methodology within the client, or by utilizing the "Explode message/Explode now" functionality. Local filesystem access is needed by the attacker.

Weakness: CWE-312 (Cleartext Storage of Sensitive Information)

## Which versions are affected by CVE-2021-23827?

It affects 1 product.


Products: Keybase Keybase.

## How do I fix CVE-2021-23827?

No fix has been published for CVE-2021-23827 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-23827 being exploited?

There is no known exploitation of CVE-2021-23827 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2019-7249](https://insights.sbomify.com/CVE-2019-7249/): Race condition in n/a (critical 9.8)
- [CVE-2018-18629](https://insights.sbomify.com/CVE-2018-18629/): Privilege escalation in n/a (high 7.8)
- [CVE-2019-16992](https://insights.sbomify.com/CVE-2019-16992/): Other in n/a (high 7.5)
- [CVE-2021-34422](https://insights.sbomify.com/CVE-2021-34422/): Path traversal of file names in Keybase Client for Windows (high 7.2)
- [CVE-2021-34426](https://insights.sbomify.com/CVE-2021-34426/): Arbitrary command execution in Keybase Client for Windows (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-23827 and fix it if it is affected.

What it is: CVE-2021-23827 is a medium-severity vulnerability in n/a, published on 22 Feb 2021. 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-2021-23827 in the wild and no public exploit code.

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-2021-23827/ (Markdown: https://insights.sbomify.com/CVE-2021-23827/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-23827
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-23827
- OSV: https://osv.dev/vulnerability/CVE-2021-23827

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-23827/
Summaries are generated and may contain mistakes; the official description above is the record.