# CVE-2022-25872: Out-of-bounds Read

> An attacker can read previously allocated memory by providing non-string input to the fast-string-search library, potentially exposing sensitive data.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Jun 2022
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-hmqg-p8f8-3qrw

## What is CVE-2022-25872?

CVE-2022-25872 is a medium-severity vulnerability in fast-string-search, published on 17 Jun 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

All versions of package fast-string-search are vulnerable to Out-of-bounds Read due to incorrect memory freeing and length calculation for any non-string input as the source. This allows the attacker to read previously allocated memory.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2022-25872?

2 open source packages ship an affected version, including fast-string-search. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `fast-string-search` | npm | All versions to 1.4.3 | None |
| `fast-string-search` | npm | All versions to 1.4.3 | None |

Products: Fast String Search Project Fast String Search.

## How do I fix CVE-2022-25872?

No fix has been published for CVE-2022-25872 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-25872 being exploited?

There is no known exploitation of CVE-2022-25872 in the wild and no public exploit code.

## Other vulnerabilities in fast-string-search

- [CVE-2022-22138](https://insights.sbomify.com/CVE-2022-22138/): Denial of Service (DoS) (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-25872 and fix it if it is affected.

What it is: CVE-2022-25872 is a medium-severity vulnerability in fast-string-search, published on 17 Jun 2022. 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-2022-25872 in the wild and no public exploit code.

Affected packages and fixed versions:
- fast-string-search (npm): affected all versions up to 1.4.3; no fix listed
- fast-string-search (npm): affected all versions up to 1.4.3; no fix listed

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-2022-25872/ (Markdown: https://insights.sbomify.com/CVE-2022-25872/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-25872
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-25872
- OSV: https://osv.dev/vulnerability/CVE-2022-25872

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-25872/
Summaries are generated and may contain mistakes; the official description above is the record.