# CVE-2023-30455: Denial of service in n/a

> Attackers can cause server overload and denial of service by sending requests with excessive e-statement IDs to the download endpoint.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Apr 2023
- **Updated:** 30 Jan 2025
- **Also known as:** GHSA-g2fq-w2p2-cg8q

## What is CVE-2023-30455?

CVE-2023-30455 is a high-severity denial of service vulnerability in n/a, published on 28 Apr 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in ebankIT before 7. A Denial-of-Service attack is possible through the GET parameter EStatementsIds located on the /Controls/Generic/EBMK/Handlers/EStatements/DownloadEStatement.ashx endpoint. The GET parameter accepts over 100 comma-separated e-statement IDs without throwing an error. When this many IDs are supplied, the server takes around 60 seconds to respond and successfully generate the expected ZIP archive (during this time period, no other pages load). A threat actor could issue a request to this endpoint with 100+ statement IDs every 30 seconds, potentially resulting in an overload of the server for all users.

Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling)

## Which versions are affected by CVE-2023-30455?

It affects 1 product.


Products: Ebankit Ebankit.

## How do I fix CVE-2023-30455?

No fix has been published for CVE-2023-30455 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-30455 being exploited?

There is no known exploitation of CVE-2023-30455 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2023-33291](https://insights.sbomify.com/CVE-2023-33291/): Business logic in n/a (high 7.4)
- [CVE-2023-30454](https://insights.sbomify.com/CVE-2023-30454/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-30455 and fix it if it is affected.

What it is: CVE-2023-30455 is a high-severity denial of service vulnerability in n/a, published on 28 Apr 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-30455 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-2023-30455/ (Markdown: https://insights.sbomify.com/CVE-2023-30455/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-30455
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-30455
- OSV: https://osv.dev/vulnerability/CVE-2023-30455

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-30455/
Summaries are generated and may contain mistakes; the official description above is the record.