# CVE-2017-7507: Null dereference in gnutls

> A NULL pointer dereference in GnuTLS allows remote attackers to crash server applications via crafted TLS status response extensions.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 16 Jun 2017
- **Updated:** 5 Aug 2024
- **Also known as:** ALPINE-CVE-2017-7507, DEBIAN-CVE-2017-7507, DSA-3884-1, GHSA-w59v-wh6q-qc58, UBUNTU-CVE-2017-7507

## What is CVE-2017-7507?

CVE-2017-7507 is a high-severity vulnerability in Gnu Gnutls, published on 16 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

GnuTLS version 3.5.12 and earlier is vulnerable to a NULL pointer dereference while decoding a status response TLS extension with valid contents. This could lead to a crash of the GnuTLS server application.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2017-7507?

It affects 1 product.


Products: Gnu Gnutls.

## How do I fix CVE-2017-7507?

Upgrade to a fixed version.

## Is CVE-2017-7507 being exploited?

There is no known exploitation of CVE-2017-7507 in the wild and no public exploit code.

## Other vulnerabilities in Gnu Gnutls

- [CVE-2008-1948](https://insights.sbomify.com/CVE-2008-1948/): Memory corruption in n/a (critical 10.0)
- [CVE-2017-5334](https://insights.sbomify.com/CVE-2017-5334/): Use after free in n/a (critical 9.8)
- [CVE-2017-5336](https://insights.sbomify.com/CVE-2017-5336/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-5337](https://insights.sbomify.com/CVE-2017-5337/): Memory corruption in n/a (critical 9.8)
- [CVE-2008-1949](https://insights.sbomify.com/CVE-2008-1949/): Null dereference in n/a (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-7507 and fix it if it is affected.

What it is: CVE-2017-7507 is a high-severity vulnerability in Gnu Gnutls, published on 16 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-7507 in the wild and no public exploit code.

Affected product: Gnu Gnutls. 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-2017-7507/ (Markdown: https://insights.sbomify.com/CVE-2017-7507/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-7507
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-7507
- OSV: https://osv.dev/vulnerability/CVE-2017-7507

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-7507/
Summaries are generated and may contain mistakes; the official description above is the record.