# CVE-2012-2110: Memory corruption in n/a

> Remote attackers can trigger buffer overflows via crafted DER data, causing denial of service or potential code execution in applications using 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:** 19 Apr 2012
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2012-2110, GHSA-mm35-fwq5-v845, RHSA-2012:0518, RHSA-2012:0522

## What is CVE-2012-2110?

CVE-2012-2110 is a high-severity memory corruption vulnerability in Openssl Openssl, published on 19 Apr 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The asn1_d2i_read_bio function in crypto/asn1/a_d2i_fp.c in OpenSSL before 0.9.8v, 1.0.0 before 1.0.0i, and 1.0.1 before 1.0.1a does not properly interpret integer data, which allows 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.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2012-2110?

It affects 2 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `openssl` | Red Hat:enterprise_linux:5::client | All versions | 0:0.9.8e-22.el5_8.3 |
| `openssl-debuginfo` | Red Hat:enterprise_linux:5::client | All versions | 0:0.9.8e-22.el5_8.3 |
| `openssl-perl` | Red Hat:enterprise_linux:5::client | All versions | 0:0.9.8e-22.el5_8.3 |
| `openssl097a` | Red Hat:enterprise_linux:5::client | All versions | 0:0.9.7a-11.el5_8.2 |
| `openssl097a-debuginfo` | Red Hat:enterprise_linux:5::client | All versions | 0:0.9.7a-11.el5_8.2 |
| `openssl` | Red Hat:enterprise_linux:5::client_workstation | All versions | 0:0.9.8e-22.el5_8.3 |
| `openssl-debuginfo` | Red Hat:enterprise_linux:5::client_workstation | All versions | 0:0.9.8e-22.el5_8.3 |
| `openssl-devel` | Red Hat:enterprise_linux:5::client_workstation | All versions | 0:0.9.8e-22.el5_8.3 |
| `openssl` | Red Hat:enterprise_linux:5::server | All versions | 0:0.9.8e-22.el5_8.3 |
| `openssl-debuginfo` | Red Hat:enterprise_linux:5::server | All versions | 0:0.9.8e-22.el5_8.3 |
| `openssl-devel` | Red Hat:enterprise_linux:5::server | All versions | 0:0.9.8e-22.el5_8.3 |
| `openssl-perl` | Red Hat:enterprise_linux:5::server | All versions | 0:0.9.8e-22.el5_8.3 |
| `openssl097a` | Red Hat:enterprise_linux:5::server | All versions | 0:0.9.7a-11.el5_8.2 |
| `openssl097a-debuginfo` | Red Hat:enterprise_linux:5::server | All versions | 0:0.9.7a-11.el5_8.2 |
| `openssl` | Red Hat:enterprise_linux:6::client | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl-debuginfo` | Red Hat:enterprise_linux:6::client | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl-devel` | Red Hat:enterprise_linux:6::client | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl-perl` | Red Hat:enterprise_linux:6::client | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl-static` | Red Hat:enterprise_linux:6::client | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl098e` | Red Hat:enterprise_linux:6::client | All versions | 0:0.9.8e-17.el6_2.2 |
| `openssl098e-debuginfo` | Red Hat:enterprise_linux:6::client | All versions | 0:0.9.8e-17.el6_2.2 |
| `openssl` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl-debuginfo` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl-devel` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl-perl` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl-static` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl098e` | Red Hat:enterprise_linux:6::computenode | All versions | 0:0.9.8e-17.el6_2.2 |
| `openssl098e-debuginfo` | Red Hat:enterprise_linux:6::computenode | All versions | 0:0.9.8e-17.el6_2.2 |
| `openssl` | Red Hat:enterprise_linux:6::server | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl-debuginfo` | Red Hat:enterprise_linux:6::server | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl-devel` | Red Hat:enterprise_linux:6::server | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl-perl` | Red Hat:enterprise_linux:6::server | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl-static` | Red Hat:enterprise_linux:6::server | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl098e` | Red Hat:enterprise_linux:6::server | All versions | 0:0.9.8e-17.el6_2.2 |
| `openssl098e-debuginfo` | Red Hat:enterprise_linux:6::server | All versions | 0:0.9.8e-17.el6_2.2 |
| `openssl` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl-debuginfo` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl-devel` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl-perl` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.0.0-20.el6_2.4 |
| `openssl-static` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.0.0-20.el6_2.4 |

Products: Openssl Openssl, Redhat Openssl.

## How do I fix CVE-2012-2110?

Upgrade to a fixed version.

## Is CVE-2012-2110 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2012-2110 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-2012-2110 and fix it if it is affected.

What it is: CVE-2012-2110 is a high-severity memory corruption vulnerability in Openssl Openssl, published on 19 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-2012-2110 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-2012-2110/ (Markdown: https://insights.sbomify.com/CVE-2012-2110/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2012-2110
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2012-2110
- OSV: https://osv.dev/vulnerability/CVE-2012-2110

---
From sbomify Insights: https://insights.sbomify.com/CVE-2012-2110/
Summaries are generated and may contain mistakes; the official description above is the record.