# CVE-2023-31102: Integer overflow in n/a

> An attacker can cause a denial of service via a crafted 7Z archive exploiting an integer underflow in the 7-Zip library.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 3 Nov 2023
- **Updated:** 6 Sep 2024
- **Also known as:** DEBIAN-CVE-2023-31102, GHSA-4cc6-f2xj-w7jx, UBUNTU-CVE-2023-31102

## What is CVE-2023-31102?

CVE-2023-31102 is a high-severity vulnerability in Netapp Active Iq Unified Manager, published on 3 Nov 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Ppmd7.c in 7-Zip before 23.00 allows an integer underflow and invalid read operation via a crafted 7Z archive.

Weakness: CWE-191 (Integer Underflow (Wrap or Wraparound))

## Which versions are affected by CVE-2023-31102?

It affects 3 products.


Products: 7-Zip 7-Zip, Netapp Active Iq Unified Manager, Netapp Oncommand Workflow Automation.

## How do I fix CVE-2023-31102?

Upgrade to a fixed version.

## Is CVE-2023-31102 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-31102 exists.

## Other vulnerabilities in Netapp Active Iq Unified Manager

- [CVE-2025-0411](https://insights.sbomify.com/CVE-2025-0411/): 7-Zip Mark of the Web Bypass (high 7.0, exploited in the wild)
- [CVE-2008-6536](https://insights.sbomify.com/CVE-2008-6536/): Other in n/a (critical 10.0)
- [CVE-2026-48095](https://insights.sbomify.com/CVE-2026-48095/): GHSL-2026-140_7-Zip: 7-Zip has a heap buffer overflow via NTFS compressed stream buffer under-allocation (high 8.8)
- [CVE-2018-10172](https://insights.sbomify.com/CVE-2018-10172/): Privilege escalation in n/a (high 8.8)
- [CVE-2016-2335](https://insights.sbomify.com/CVE-2016-2335/): Memory corruption in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-31102 and fix it if it is affected.

What it is: CVE-2023-31102 is a high-severity vulnerability in Netapp Active Iq Unified Manager, published on 3 Nov 2023. It can only be exploited from the same machine or local network, 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-2023-31102 exists.

Affected product: Netapp Active Iq Unified Manager. 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-2023-31102/ (Markdown: https://insights.sbomify.com/CVE-2023-31102/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-31102
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-31102
- OSV: https://osv.dev/vulnerability/CVE-2023-31102

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-31102/
Summaries are generated and may contain mistakes; the official description above is the record.