# CVE-2019-12957: Memory corruption in n/a

> A buffer over-read in Xpdf allows attackers to cause denial of service or information disclosure via crafted PDF files.

- **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:** 24 Jun 2019
- **Updated:** 4 Aug 2024
- **Also known as:** DEBIAN-CVE-2019-12957, GHSA-g98h-xvfp-4q9x

## What is CVE-2019-12957?

CVE-2019-12957 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, 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 buffer over-read could be triggered in FoFiType1C::convertToType1 in fofi/FoFiType1C.cc when the index number is larger than the charset array bounds. It can, for example, be triggered by sending a crafted PDF document to the pdftops tool. It allows an attacker to use a crafted pdf file to cause Denial of Service or an information leak, or possibly have unspecified other impact.

Weakness: CWE-129 (Improper Validation of Array Index), CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2019-12957?

It affects 2 products.


Products: Fedoraproject Fedora, Glyphandcog Xpdfreader.

## How do I fix CVE-2019-12957?

Upgrade to a fixed version.

## Is CVE-2019-12957 being exploited?

There is no known exploitation of CVE-2019-12957 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-12957 and fix it if it is affected.

What it is: CVE-2019-12957 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, 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-2019-12957 in the wild and no public exploit code.

Affected product: Fedoraproject Fedora. 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-2019-12957/ (Markdown: https://insights.sbomify.com/CVE-2019-12957/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-12957
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-12957
- OSV: https://osv.dev/vulnerability/CVE-2019-12957

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-12957/
Summaries are generated and may contain mistakes; the official description above is the record.