# CVE-2007-2727: Weak cryptography in n/a

> Predictable initialization vectors in PHP mcrypt allow attackers to decrypt data more easily due to weak random number generation.

- **Severity:** Low 2.6 (`AV:N/AC:H/Au:N/C:P/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 May 2007
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-4j4f-jw3x-9gm3

## What is CVE-2007-2727?

CVE-2007-2727 is a low-severity vulnerability in Php Php, published on 16 May 2007. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The mcrypt_create_iv function in ext/mcrypt/mcrypt.c in PHP before 4.4.7, 5.2.1, and possibly 5.0.x and other PHP 5 versions, calls php_rand_r with an uninitialized seed variable and therefore always generates the same initialization vector (IV), which might allow context-dependent attackers to decrypt certain data more easily because of the guessable encryption keys.

## Which versions are affected by CVE-2007-2727?

It affects 1 product.


Products: Php Php.

## How do I fix CVE-2007-2727?

No fix has been published for CVE-2007-2727 yet. Limit exposure of the affected software until one is available.

## Is CVE-2007-2727 being exploited?

There is no known exploitation of CVE-2007-2727 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-2007-2727 and fix it if it is affected.

What it is: CVE-2007-2727 is a low-severity vulnerability in Php Php, published on 16 May 2007. 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-2007-2727 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-2007-2727/ (Markdown: https://insights.sbomify.com/CVE-2007-2727/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2007-2727
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2007-2727
- OSV: https://osv.dev/vulnerability/CVE-2007-2727

---
From sbomify Insights: https://insights.sbomify.com/CVE-2007-2727/
Summaries are generated and may contain mistakes; the official description above is the record.