# CVE-2012-2131: Integer overflow in n/a

> Remote attackers can cause denial of service or potential code execution via crafted DER data due to integer signedness errors in OpenSSL.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 24 Apr 2012
- **Updated:** 6 Aug 2024
- **Also known as:** DSA-2454-2, GHSA-wvj2-94fg-jpr9

## What is CVE-2012-2131?

CVE-2012-2131 is a high-severity vulnerability in Openssl Openssl, published on 24 Apr 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Multiple integer signedness errors in crypto/buffer/buffer.c in OpenSSL 0.9.8v allow remote attackers to conduct buffer overflow attacks, and cause a denial of service (memory corruption) or possibly have unspecified other impact, via crafted DER data, as demonstrated by an X.509 certificate or an RSA public key.  NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-2110.

Weakness: CWE-189

## Which versions are affected by CVE-2012-2131?

It affects 1 product.


Products: Openssl Openssl.

## How do I fix CVE-2012-2131?

Upgrade to a fixed version.

## Is CVE-2012-2131 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2012-2131 exists.

Public exploit code:

- OpenSSL - ASN1 BIO Memory Corruption (exploitdb)

## Other vulnerabilities in Openssl Openssl

- [CVE-2009-3245](https://insights.sbomify.com/CVE-2009-3245/): Null dereference in n/a (critical 10.0)
- [CVE-2006-3738](https://insights.sbomify.com/CVE-2006-3738/): Memory corruption in n/a (critical 10.0)
- [CVE-2026-63073](https://insights.sbomify.com/CVE-2026-63073/): Untrusted Sender DN Used as Format String in CMP Response Validation (critical 9.8)
- [CVE-2016-6309](https://insights.sbomify.com/CVE-2016-6309/): Use after free in n/a (critical 9.8)
- [CVE-2016-0799](https://insights.sbomify.com/CVE-2016-0799/): Integer overflow in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2012-2131 and fix it if it is affected.

What it is: CVE-2012-2131 is a high-severity vulnerability in Openssl Openssl, published on 24 Apr 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2012-2131 exists.

Affected product: Openssl Openssl. 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-2012-2131/ (Markdown: https://insights.sbomify.com/CVE-2012-2131/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2012-2131
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2012-2131
- OSV: https://osv.dev/vulnerability/CVE-2012-2131

---
From sbomify Insights: https://insights.sbomify.com/CVE-2012-2131/
Summaries are generated and may contain mistakes; the official description above is the record.