# CVE-2017-12933: Memory corruption in n/a

> A buffer over-read in PHP's unserializer allows attackers to cause integrity issues or crashes when processing untrusted data.

- **Severity:** Critical 9.8 (`CVSS:3.0/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:** 18 Aug 2017
- **Updated:** 5 Aug 2024
- **Also known as:** CVE-2017-1000202, DLA-1076-1, GHSA-rfjj-ch7h-pvv6, SUSE-SU-2017:2518-1, UBUNTU-CVE-2017-12933

## What is CVE-2017-12933?

CVE-2017-12933 is a critical memory corruption vulnerability in Php Php, published on 18 Aug 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The finish_nested_data function in ext/standard/var_unserializer.re in PHP before 5.6.31, 7.0.x before 7.0.21, and 7.1.x before 7.1.7 is prone to a buffer over-read while unserializing untrusted data. Exploitation of this issue can have an unspecified impact on the integrity of PHP.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2017-12933?

It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `php5` | SUSE:Linux Enterprise Module for Web and Scripting 12 | All versions | 5.5.14-109.8.2 |
| `php5` | SUSE:Linux Enterprise Software Development Kit 12 SP2 | All versions | 5.5.14-109.8.2 |
| `php5` | SUSE:Linux Enterprise Software Development Kit 12 SP3 | All versions | 5.5.14-109.8.2 |

Products: Php Php.

## How do I fix CVE-2017-12933?

Upgrade to a fixed version.

## Is CVE-2017-12933 being exploited?

There is no known exploitation of CVE-2017-12933 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-2017-12933 and fix it if it is affected.

What it is: CVE-2017-12933 is a critical memory corruption vulnerability in Php Php, published on 18 Aug 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-2017-12933 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-2017-12933/ (Markdown: https://insights.sbomify.com/CVE-2017-12933/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-12933
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-12933
- OSV: https://osv.dev/vulnerability/CVE-2017-12933

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-12933/
Summaries are generated and may contain mistakes; the official description above is the record.