# CVE-2020-27423: Denial of service in n/a

> An attacker can exhaust a legitimate user's mailbox by triggering unlimited password reset emails due to missing rate limits in Anuko Time Tracker.

- **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:** 16 Nov 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-587h-jw63-jwf2

## What is CVE-2020-27423?

CVE-2020-27423 is a high-severity denial of service vulnerability in n/a, published on 16 Nov 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Anuko Time Tracker v1.19.23.5311 lacks rate limit on the password reset module which allows attacker to perform Denial of Service attack on any legitimate user's mailbox

Weakness: CWE-307 (Improper Restriction of Excessive Authentication Attempts)

## Which versions are affected by CVE-2020-27423?

It affects 1 product.


Products: Anuko Time Tracker.

## How do I fix CVE-2020-27423?

No fix has been published for CVE-2020-27423 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-27423 being exploited?

There is no known exploitation of CVE-2020-27423 in the wild and no public exploit code.

Public exploit code:

- Anuko Time Tracker 1.19.23.5311 - No rate Limit on Password Reset functionality (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2020-27422](https://insights.sbomify.com/CVE-2020-27422/): Business logic in n/a (critical 9.8)
- [CVE-2023-32306](https://insights.sbomify.com/CVE-2023-32306/): Time Tracker has Blind SQL Injection Vulnerability in Reports (high 8.8)
- [CVE-2020-15255](https://insights.sbomify.com/CVE-2020-15255/): CSV injection in Anuko Time Tracker (high 8.7)
- [CVE-2023-32308](https://insights.sbomify.com/CVE-2023-32308/): SQL Injection Vulnerability in anuko timetracker (high 8.2)
- [CVE-2021-43851](https://insights.sbomify.com/CVE-2021-43851/): SQL injection vulnerability in anuko timetracker (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-27423 and fix it if it is affected.

What it is: CVE-2020-27423 is a high-severity denial of service vulnerability in n/a, published on 16 Nov 2020. 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-2020-27423 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-2020-27423/ (Markdown: https://insights.sbomify.com/CVE-2020-27423/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-27423
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-27423
- OSV: https://osv.dev/vulnerability/CVE-2020-27423

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-27423/
Summaries are generated and may contain mistakes; the official description above is the record.