# CVE-2017-5340: Integer overflow in n/a

> Remote attackers can execute arbitrary code or cause denial of service via crafted serialized data due to integer overflow in PHP's hash handling.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:** 11 Jan 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-mcgr-9688-597c, UBUNTU-CVE-2017-5340

## What is CVE-2017-5340?

CVE-2017-5340 is a critical vulnerability in Netapp Clustered Data Ontap, published on 11 Jan 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Zend/zend_hash.c in PHP before 7.0.15 and 7.1.x before 7.1.1 mishandles certain cases that require large array allocations, which allows remote attackers to execute arbitrary code or cause a denial of service (integer overflow, uninitialized memory access, and use of arbitrary destructor function pointers) via crafted serialized data.

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2017-5340?

It affects 2 products.


Products: Netapp Clustered Data Ontap, Php Php.

## How do I fix CVE-2017-5340?

Upgrade to a fixed version.

## Is CVE-2017-5340 being exploited?

There is no known exploitation of CVE-2017-5340 in the wild and no public exploit code.

## Other vulnerabilities in Netapp Clustered Data Ontap

- [CVE-2015-7853](https://insights.sbomify.com/CVE-2015-7853/): Integer overflow in n/a (critical 9.8)
- [CVE-2017-9119](https://insights.sbomify.com/CVE-2017-9119/): Denial of service in n/a (critical 9.8)
- [CVE-2016-7480](https://insights.sbomify.com/CVE-2016-7480/): Deserialization in PHP before 7.0.12 (critical 9.8)
- [CVE-2017-11147](https://insights.sbomify.com/CVE-2017-11147/): Information disclosure in n/a (critical 9.1)
- [CVE-2018-5490](https://insights.sbomify.com/CVE-2018-5490/): Missing authorization in Clustered Data ONTAP (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-5340 and fix it if it is affected.

What it is: CVE-2017-5340 is a critical vulnerability in Netapp Clustered Data Ontap, published on 11 Jan 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-2017-5340 in the wild and no public exploit code.

Affected product: Netapp Clustered Data Ontap. 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-2017-5340/ (Markdown: https://insights.sbomify.com/CVE-2017-5340/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-5340
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-5340
- OSV: https://osv.dev/vulnerability/CVE-2017-5340

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-5340/
Summaries are generated and may contain mistakes; the official description above is the record.