# CVE-2017-15377: Denial of service in n/a

> Attackers can cause denial of service in Suricata by triggering redundant content checks with crafted network traffic.

- **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:** 23 Oct 2017
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2017-15377, GHSA-4p84-v7gc-359m, UBUNTU-CVE-2017-15377

## What is CVE-2017-15377?

CVE-2017-15377 is a high-severity denial of service vulnerability in n/a, published on 23 Oct 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In Suricata before 4.x, it was possible to trigger lots of redundant checks on the content of crafted network traffic with a certain signature, because of DetectEngineContentInspection in detect-engine-content-inspection.c. The search engine doesn't stop when it should after no match is found; instead, it stops only upon reaching inspection-recursion-limit (3000 by default).

## Which versions are affected by CVE-2017-15377?

It affects 1 product.


Products: Openinfosecfoundation Suricata.

## How do I fix CVE-2017-15377?

Upgrade to a fixed version.

## Is CVE-2017-15377 being exploited?

There is no known exploitation of CVE-2017-15377 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2015-8954](https://insights.sbomify.com/CVE-2015-8954/): Security feature bypass in n/a (critical 9.8)
- [CVE-2017-7177](https://insights.sbomify.com/CVE-2017-7177/): Suricata before 3.2.1 has an IPv4 defragmentation evasion issue caused by lack of a check for the IP protocol during fragment matching. (high 7.5)
- [CVE-2014-6603](https://insights.sbomify.com/CVE-2014-6603/): The SSHParseBanner function in SSH parser (app-layer-ssh.c) in Suricata before 2.0.4 allows remote attackers to bypass SSH rules, cause a de (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-15377 and fix it if it is affected.

What it is: CVE-2017-15377 is a high-severity denial of service vulnerability in n/a, published on 23 Oct 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-2017-15377 in the wild and no public exploit code.

Affected product: n/a. 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-2017-15377/ (Markdown: https://insights.sbomify.com/CVE-2017-15377/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-15377
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-15377
- OSV: https://osv.dev/vulnerability/CVE-2017-15377

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-15377/
Summaries are generated and may contain mistakes; the official description above is the record.