# CVE-2023-31556: Memory corruption in n/a

> A segmentation violation in podofoinfo allows attackers to cause a denial of service via crafted PDF files.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 10 May 2023
- **Updated:** 27 Jan 2025
- **Also known as:** GHSA-r738-vmx2-9fp4

## What is CVE-2023-31556?

CVE-2023-31556 is a high-severity memory corruption vulnerability in Podofo Project Podofo, published on 10 May 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

podofoinfo 0.10.0 was discovered to contain a segmentation violation via the function PoDoFo::PdfDictionary::findKeyParent.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2023-31556?

It affects 1 product.


Products: Podofo Project Podofo.

## How do I fix CVE-2023-31556?

No fix has been published for CVE-2023-31556 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-31556 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-31556 exists.

## Other vulnerabilities in Podofo Project Podofo

- [CVE-2017-8378](https://insights.sbomify.com/CVE-2017-8378/): Memory corruption in n/a (critical 9.8)
- [CVE-2015-8981](https://insights.sbomify.com/CVE-2015-8981/): Memory corruption in n/a (critical 9.8)
- [CVE-2023-31566](https://insights.sbomify.com/CVE-2023-31566/): Use after free in n/a (high 8.8)
- [CVE-2023-31567](https://insights.sbomify.com/CVE-2023-31567/): Memory corruption in n/a (high 8.8)
- [CVE-2023-31568](https://insights.sbomify.com/CVE-2023-31568/): Memory corruption in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-31556 and fix it if it is affected.

What it is: CVE-2023-31556 is a high-severity memory corruption vulnerability in Podofo Project Podofo, published on 10 May 2023. An attacker can exploit it over the internet without logging in, 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-2023-31556 exists.

Affected product: Podofo Project Podofo. 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-2023-31556/ (Markdown: https://insights.sbomify.com/CVE-2023-31556/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-31556
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-31556
- OSV: https://osv.dev/vulnerability/CVE-2023-31556

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-31556/
Summaries are generated and may contain mistakes; the official description above is the record.