# CVE-2017-11696: Memory corruption in n/a

> Heap-based buffer overflow in Mozilla NSS allows attackers to cause unspecified impact via a crafted cert8.db file.

- **Severity:** High 7.8 (`CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 27 Dec 2017
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2017-11696, ECHO-4636-2815-6eb2, GHSA-3mcr-pwj8-hwgr, UBUNTU-CVE-2017-11696

## What is CVE-2017-11696?

CVE-2017-11696 is a high-severity memory corruption vulnerability in Mozilla Network Security Services, published on 27 Dec 2017. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Heap-based buffer overflow in the __hash_open function in lib/dbm/src/hash.c in Mozilla Network Security Services (NSS) allows context-dependent attackers to have unspecified impact using a crafted cert8.db file.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2017-11696?

It affects 1 product.


Products: Mozilla Network Security Services.

## How do I fix CVE-2017-11696?

Apply the vendor's patch.

## Is CVE-2017-11696 being exploited?

There is no known exploitation of CVE-2017-11696 in the wild and no public exploit code.

## Other vulnerabilities in Mozilla Network Security Services

- [CVE-2019-17006](https://insights.sbomify.com/CVE-2019-17006/): Memory corruption in NSS (critical 9.8)
- [CVE-2017-5461](https://insights.sbomify.com/CVE-2017-5461/): Memory corruption in Firefox (critical 9.8)
- [CVE-2009-2404](https://insights.sbomify.com/CVE-2009-2404/): Memory corruption in n/a (critical 9.3)
- [CVE-2017-11695](https://insights.sbomify.com/CVE-2017-11695/): Memory corruption in n/a (high 7.8)
- [CVE-2017-11697](https://insights.sbomify.com/CVE-2017-11697/): Denial of service in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-11696 and fix it if it is affected.

What it is: CVE-2017-11696 is a high-severity memory corruption vulnerability in Mozilla Network Security Services, published on 27 Dec 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-11696 in the wild and no public exploit code.

Affected product: Mozilla Network Security Services. 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-2017-11696/ (Markdown: https://insights.sbomify.com/CVE-2017-11696/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-11696
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-11696
- OSV: https://osv.dev/vulnerability/CVE-2017-11696

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-11696/
Summaries are generated and may contain mistakes; the official description above is the record.