# CVE-2018-7648: Memory corruption in n/a

> A buffer overflow in OpenJPEG allows attackers to execute arbitrary code or cause denial of service via a long command-line prefix.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 2 Mar 2018
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2018-7648, GHSA-8pw2-vgv2-w498

## What is CVE-2018-7648?

CVE-2018-7648 is a critical memory corruption vulnerability in Uclouvain Openjpeg, published on 2 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in mj2/opj_mj2_extract.c in OpenJPEG 2.3.0. The output prefix was not checked for length, which could overflow a buffer, when providing a prefix with 50 or more characters on the command line.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2018-7648?

It affects 1 product.


Products: Uclouvain Openjpeg.

## How do I fix CVE-2018-7648?

Apply the vendor's patch.

## Is CVE-2018-7648 being exploited?

There is no known exploitation of CVE-2018-7648 in the wild and no public exploit code.

## Other vulnerabilities in Uclouvain Openjpeg

- [CVE-2013-4289](https://insights.sbomify.com/CVE-2013-4289/): Integer overflow in n/a (critical 10.0)
- [CVE-2013-4290](https://insights.sbomify.com/CVE-2013-4290/): Memory corruption in n/a (critical 10.0)
- [CVE-2012-3358](https://insights.sbomify.com/CVE-2012-3358/): Memory corruption in n/a (critical 10.0)
- [CVE-2017-17479](https://insights.sbomify.com/CVE-2017-17479/): Memory corruption in n/a (critical 9.8)
- [CVE-2012-1499](https://insights.sbomify.com/CVE-2012-1499/): Memory corruption in n/a (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-7648 and fix it if it is affected.

What it is: CVE-2018-7648 is a critical memory corruption vulnerability in Uclouvain Openjpeg, published on 2 Mar 2018. 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-2018-7648 in the wild and no public exploit code.

Affected product: Uclouvain Openjpeg. 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-2018-7648/ (Markdown: https://insights.sbomify.com/CVE-2018-7648/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-7648
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-7648
- OSV: https://osv.dev/vulnerability/CVE-2018-7648

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-7648/
Summaries are generated and may contain mistakes; the official description above is the record.