# CVE-2012-0785: Hash collision attack vulnerability in Jenkins

> Remote attackers can cause excessive CPU load via hash collisions, leading to denial of service in Jenkins.

- **Severity:** High 7.5 (`CVSS:3.1/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:** 24 Feb 2020
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-pchp-c5w8-47gc

## What is CVE-2012-0785?

CVE-2012-0785 is a high-severity denial of service vulnerability in Jenkins Jenkins, published on 24 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Hash collision attack vulnerability in Jenkins before 1.447, Jenkins LTS before 1.424.2, and Jenkins Enterprise by CloudBees 1.424.x before 1.424.2.1 and 1.400.x before 1.400.0.11 could allow remote attackers to cause a considerable CPU load, aka "the Hash DoS attack."

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2012-0785?

4 open source packages ship an affected version, including org.jenkins-ci.main:jenkins-core. It affects 2 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.jenkins-ci.main:jenkins-core` | Maven | All versions | 1.424.2 |
| `org.jenkins-ci.main:jenkins-core` | Maven | All versions | 1.424.2 |
| `org.jenkins-ci.main:jenkins-core` | Maven | From 1.425 | 1.447 |
| `org.jenkins-ci.main:jenkins-core` | Maven | From 1.425 | 1.447 |

Products: Cloudbees Jenkins, Jenkins Jenkins.

## How do I fix CVE-2012-0785?

Upgrade org.jenkins-ci.main:jenkins-core to a fixed version for your release line: 1.424.2 or 1.447.

## Is CVE-2012-0785 being exploited?

There is no known exploitation of CVE-2012-0785 in the wild and no public exploit code.

## Other vulnerabilities in Jenkins Jenkins

- [CVE-2013-2034](https://insights.sbomify.com/CVE-2013-2034/): Jenkins Cross-Site Request Forgery vulnerabilities (medium 6.8)
- [CVE-2012-6073](https://insights.sbomify.com/CVE-2012-6073/): Jenkins affected by Open Redirect Vulnerability (medium 5.8)
- [CVE-2012-6072](https://insights.sbomify.com/CVE-2012-6072/): Jenkins allows HTTP Injection and Response Splitting (medium 4.3)
- [CVE-2012-0324](https://insights.sbomify.com/CVE-2012-0324/): Jenkins allows Cross-Site Scripting (XSS) (medium 4.3)
- [CVE-2012-0325](https://insights.sbomify.com/CVE-2012-0325/): Jenkins allows Cross-Site Scripting (XSS) (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2012-0785 and fix it if it is affected.

What it is: CVE-2012-0785 is a high-severity denial of service vulnerability in Jenkins Jenkins, published on 24 Feb 2020. 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-2012-0785 in the wild and no public exploit code.

Affected packages and fixed versions:
- org.jenkins-ci.main:jenkins-core (Maven): affected all versions; fixed in 1.424.2
- org.jenkins-ci.main:jenkins-core (Maven): affected all versions; fixed in 1.424.2
- org.jenkins-ci.main:jenkins-core (Maven): affected from 1.425; fixed in 1.447
- org.jenkins-ci.main:jenkins-core (Maven): affected from 1.425; fixed in 1.447

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-2012-0785/ (Markdown: https://insights.sbomify.com/CVE-2012-0785/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2012-0785
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2012-0785
- OSV: https://osv.dev/vulnerability/CVE-2012-0785

---
From sbomify Insights: https://insights.sbomify.com/CVE-2012-0785/
Summaries are generated and may contain mistakes; the official description above is the record.