# CVE-2017-14940: Null dereference in n/a

> Remote attackers can cause a denial of service via a crafted ELF file due to a NULL pointer dereference in the BFD library.

- **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:** 29 Sep 2017
- **Updated:** 16 Sep 2024
- **Also known as:** DEBIAN-CVE-2017-14940, GHSA-9f29-4g2w-7qff, UBUNTU-CVE-2017-14940

## What is CVE-2017-14940?

CVE-2017-14940 is a medium-severity vulnerability in Gnu Binutils, published on 29 Sep 2017. 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

scan_unit_for_symbols in dwarf2.c in the Binary File Descriptor (BFD) library (aka libbfd), as distributed in GNU Binutils 2.29, allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted ELF file.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2017-14940?

It affects 1 product.


Products: Gnu Binutils.

## How do I fix CVE-2017-14940?

Apply the vendor's patch.

## Is CVE-2017-14940 being exploited?

There is no known exploitation of CVE-2017-14940 in the wild and no public exploit code.

## Other vulnerabilities in Gnu Binutils

- [CVE-2017-7614](https://insights.sbomify.com/CVE-2017-7614/): Null dereference in n/a (critical 9.8)
- [CVE-2014-9939](https://insights.sbomify.com/CVE-2014-9939/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-7226](https://insights.sbomify.com/CVE-2017-7226/): Information disclosure in n/a (critical 9.1)
- [CVE-2017-6969](https://insights.sbomify.com/CVE-2017-6969/): Information disclosure in n/a (critical 9.1)
- [CVE-2020-19726](https://insights.sbomify.com/CVE-2020-19726/): Denial of service in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-14940 and fix it if it is affected.

What it is: CVE-2017-14940 is a medium-severity vulnerability in Gnu Binutils, published on 29 Sep 2017. 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-2017-14940 in the wild and no public exploit code.

Affected product: Gnu Binutils. 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-2017-14940/ (Markdown: https://insights.sbomify.com/CVE-2017-14940/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-14940
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-14940
- OSV: https://osv.dev/vulnerability/CVE-2017-14940

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-14940/
Summaries are generated and may contain mistakes; the official description above is the record.