# CVE-2019-12958: Memory corruption in n/a

> A heap-based buffer over-read in Xpdf's Type1C font conversion allows attackers to cause denial of service or potentially execute code via malicious PDFs.

- **Severity:** Medium 5.5 (`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/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:** 24 Jun 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-x6m5-g86w-pv2v, UBUNTU-CVE-2019-12958

## What is CVE-2019-12958?

CVE-2019-12958 is a medium-severity memory corruption vulnerability in Glyphandcog Xpdfreader, published on 24 Jun 2019. 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

In Xpdf 4.01.01, a heap-based buffer over-read could be triggered in FoFiType1C::convertToType0 in fofi/FoFiType1C.cc when it is trying to access the second privateDicts array element, because the privateDicts array has only one element allocated.

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

## Which versions are affected by CVE-2019-12958?

It affects 1 product.


Products: Glyphandcog Xpdfreader.

## How do I fix CVE-2019-12958?

Upgrade to a fixed version.

## Is CVE-2019-12958 being exploited?

There is no known exploitation of CVE-2019-12958 in the wild and no public exploit code.

## Other vulnerabilities in Glyphandcog Xpdfreader

- [CVE-2022-24106](https://insights.sbomify.com/CVE-2022-24106/): Integer overflow in n/a (high 7.8)
- [CVE-2022-24107](https://insights.sbomify.com/CVE-2022-24107/): Integer overflow in n/a (high 7.8)
- [CVE-2019-16115](https://insights.sbomify.com/CVE-2019-16115/): Memory corruption in n/a (high 7.8)
- [CVE-2019-14288](https://insights.sbomify.com/CVE-2019-14288/): Integer overflow in n/a (high 7.8)
- [CVE-2019-13289](https://insights.sbomify.com/CVE-2019-13289/): Use after free in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-12958 and fix it if it is affected.

What it is: CVE-2019-12958 is a medium-severity memory corruption vulnerability in Glyphandcog Xpdfreader, published on 24 Jun 2019. 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: There is no known exploitation of CVE-2019-12958 in the wild and no public exploit code.

Affected product: Glyphandcog Xpdfreader. 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-2019-12958/ (Markdown: https://insights.sbomify.com/CVE-2019-12958/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-12958
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-12958
- OSV: https://osv.dev/vulnerability/CVE-2019-12958

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-12958/
Summaries are generated and may contain mistakes; the official description above is the record.