# CVE-2012-6093: Security feature bypass in n/a

> Incorrect memory reading in Qt SSL error handling may cause users to accept invalid certificates, bypassing security validation.

- **Severity:** Medium 4.3 (`AV:N/AC:M/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:** A user has to click or open something
- **Fix available:** No
- **Published:** 24 Feb 2013
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-8vmr-c9ff-vrfh

## What is CVE-2012-6093?

CVE-2012-6093 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 24 Feb 2013. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

The QSslSocket::sslErrors function in Qt before 4.6.5, 4.7.x before 4.7.6, 4.8.x before 4.8.5, when using certain versions of openSSL, uses an "incompatible structure layout" that can read memory from the wrong location, which causes Qt to report an incorrect error when certificate validation fails and might cause users to make unsafe security decisions to accept a certificate.

Weakness: CWE-310

## Which versions are affected by CVE-2012-6093?

It affects 3 products.


Products: Canonical Ubuntu Linux, Opensuse Opensuse, Qt Qt.

## How do I fix CVE-2012-6093?

No fix has been published for CVE-2012-6093 yet. Limit exposure of the affected software until one is available.

## Is CVE-2012-6093 being exploited?

There is no known exploitation of CVE-2012-6093 in the wild and no public exploit code.

## Other vulnerabilities in Canonical Ubuntu Linux

- [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild)
- [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2012-6093 and fix it if it is affected.

What it is: CVE-2012-6093 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 24 Feb 2013. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2012-6093 in the wild and no public exploit code.

Affected product: Canonical Ubuntu Linux. 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-2012-6093/ (Markdown: https://insights.sbomify.com/CVE-2012-6093/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2012-6093
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2012-6093
- OSV: https://osv.dev/vulnerability/CVE-2012-6093

---
From sbomify Insights: https://insights.sbomify.com/CVE-2012-6093/
Summaries are generated and may contain mistakes; the official description above is the record.