# CVE-2022-3301: Improper Cleanup on Thrown Exception in ikus060/rdiffweb

> An attacker can cause a denial of service in rdiffweb by triggering an exception that is not properly cleaned up.

- **Severity:** Medium 4.3 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 26 Sep 2022
- **Updated:** 21 May 2025
- **Also known as:** GHSA-qq29-5vjh-vxwr, PYSEC-2022-295

## What is CVE-2022-3301?

CVE-2022-3301 is a medium-severity vulnerability in ikus060/rdiffweb, published on 26 Sep 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Improper Cleanup on Thrown Exception in GitHub repository ikus060/rdiffweb prior to 2.4.8.

Weakness: CWE-460 (Improper Cleanup on Thrown Exception)

## Which versions are affected by CVE-2022-3301?

3 open source packages ship an affected version, including rdiffweb. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `rdiffweb` | PyPI | All versions | 2.4.8 |
| `rdiffweb` | PyPI | All versions | 2.4.8 |
| `rdiffweb` | PyPI | All versions | 2.4.8 |

Products: Ikus-Soft Rdiffweb.

## How do I fix CVE-2022-3301?

Upgrade rdiffweb to 2.4.8 or later.

## Is CVE-2022-3301 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-3301 exists.

## Other vulnerabilities in ikus060/rdiffweb

- [CVE-2022-3167](https://insights.sbomify.com/CVE-2022-3167/): Improper Restriction of Rendered UI Layers or Frames in ikus060/rdiffweb (critical 10.0)
- [CVE-2022-3221](https://insights.sbomify.com/CVE-2022-3221/): Cross-Site Request Forgery (CSRF) in ikus060/rdiffweb (high 8.8)
- [CVE-2022-4724](https://insights.sbomify.com/CVE-2022-4724/): Improper Access Control in ikus060/rdiffweb (high 8.4)
- [CVE-2022-3389](https://insights.sbomify.com/CVE-2022-3389/): Path Traversal in ikus060/rdiffweb (high 8.2)
- [CVE-2022-3371](https://insights.sbomify.com/CVE-2022-3371/): rdiffweb's lack of token name length limit can result in DoS or memory corruption (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-3301 and fix it if it is affected.

What it is: CVE-2022-3301 is a medium-severity vulnerability in ikus060/rdiffweb, published on 26 Sep 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-3301 exists.

Affected packages and fixed versions:
- rdiffweb (PyPI): affected all versions; fixed in 2.4.8
- rdiffweb (PyPI): affected all versions; fixed in 2.4.8
- rdiffweb (PyPI): affected all versions; fixed in 2.4.8

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-2022-3301/ (Markdown: https://insights.sbomify.com/CVE-2022-3301/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-3301
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-3301
- OSV: https://osv.dev/vulnerability/CVE-2022-3301

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-3301/
Summaries are generated and may contain mistakes; the official description above is the record.