# CVE-2016-5114: Information disclosure in n/a

> Attackers can read sensitive memory or crash the service via long URIs in PHP FPM when custom request logging is enabled.

- **Severity:** Critical 9.1 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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:** 7 Aug 2016
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-2784-39w4-9568, UBUNTU-CVE-2016-5114

## What is CVE-2016-5114?

CVE-2016-5114 is a critical vulnerability in Php Php, published on 7 Aug 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

sapi/fpm/fpm/fpm_log.c in PHP before 5.5.31, 5.6.x before 5.6.17, and 7.x before 7.0.2 misinterprets the semantics of the snprintf return value, which allows attackers to obtain sensitive information from process memory or cause a denial of service (out-of-bounds read and buffer overflow) via a long string, as demonstrated by a long URI in a configuration with custom REQUEST_URI logging.

Weakness: CWE-125 (Out-of-bounds Read), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2016-5114?

It affects 1 product.


Products: Php Php.

## How do I fix CVE-2016-5114?

Upgrade to a fixed version.

## Is CVE-2016-5114 being exploited?

There is no known exploitation of CVE-2016-5114 in the wild and no public exploit code.

## Other vulnerabilities in Php Php

- [CVE-2012-2688](https://insights.sbomify.com/CVE-2012-2688/): Integer overflow in n/a (critical 10.0)
- [CVE-2012-2376](https://insights.sbomify.com/CVE-2012-2376/): Memory corruption in n/a (critical 10.0)
- [CVE-2011-3268](https://insights.sbomify.com/CVE-2011-3268/): Memory corruption in n/a (critical 10.0)
- [CVE-2009-4143](https://insights.sbomify.com/CVE-2009-4143/): Other in n/a (critical 10.0)
- [CVE-2008-5557](https://insights.sbomify.com/CVE-2008-5557/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-5114 and fix it if it is affected.

What it is: CVE-2016-5114 is a critical vulnerability in Php Php, published on 7 Aug 2016. 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-2016-5114 in the wild and no public exploit code.

Affected product: Php Php. 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-2016-5114/ (Markdown: https://insights.sbomify.com/CVE-2016-5114/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-5114
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-5114
- OSV: https://osv.dev/vulnerability/CVE-2016-5114

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-5114/
Summaries are generated and may contain mistakes; the official description above is the record.