# CVE-2016-9574: Denial of service in nss

> Remote attackers can cause a denial of service in NSS during session handshakes using specific cryptographic extensions.

- **Severity:** Medium 5.9 (`CVSS:3.0/AV:N/AC:H/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:** 19 Jul 2018
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2016-9574, GHSA-jq9g-rw6w-4vhv

## What is CVE-2016-9574?

CVE-2016-9574 is a medium-severity denial of service vulnerability in Mozilla Network Security Services, published on 19 Jul 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

nss before version 3.30 is vulnerable to a remote denial of service during the session handshake when using SessionTicket extension and ECDHE-ECDSA.

Weakness: CWE-384 (Session Fixation), CWE-325 (Missing Cryptographic Step)

## Which versions are affected by CVE-2016-9574?

It affects 1 product.


Products: Mozilla Network Security Services.

## How do I fix CVE-2016-9574?

Upgrade to a fixed version.

## Is CVE-2016-9574 being exploited?

There is no known exploitation of CVE-2016-9574 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-2017-11696](https://insights.sbomify.com/CVE-2017-11696/): Memory corruption in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-9574 and fix it if it is affected.

What it is: CVE-2016-9574 is a medium-severity denial of service vulnerability in Mozilla Network Security Services, published on 19 Jul 2018. 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-2016-9574 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-2016-9574/ (Markdown: https://insights.sbomify.com/CVE-2016-9574/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-9574
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-9574
- OSV: https://osv.dev/vulnerability/CVE-2016-9574

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From sbomify Insights: https://insights.sbomify.com/CVE-2016-9574/
Summaries are generated and may contain mistakes; the official description above is the record.