# CVE-2013-2776: Privilege escalation in n/a

> Local users with sudo permissions can hijack another terminal's authorization to escalate privileges when tty_tickets is enabled on systems lacking /proc.

- **Severity:** Medium 4.4 (`AV:L/AC:M/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 8 Apr 2013
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2013-2776, GHSA-crcj-xh9h-7wr8

## What is CVE-2013-2776?

CVE-2013-2776 is a medium-severity vulnerability in Apple Mac Os X, published on 8 Apr 2013. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

sudo 1.3.5 through 1.7.10p5 and 1.8.0 through 1.8.6p6, when running on systems without /proc or the sysctl function with the tty_tickets option enabled, does not properly validate the controlling terminal device, which allows local users with sudo permissions to hijack the authorization of another terminal via vectors related to connecting to the standard input, output, and error file descriptors of another terminal.  NOTE: this is one of three closely-related vulnerabilities that were originally assigned CVE-2013-1776, but they have been SPLIT because of different affected versions.

Weakness: CWE-264

## Which versions are affected by CVE-2013-2776?

It affects 2 products.


Products: Apple Mac Os X, Todd Miller Sudo.

## How do I fix CVE-2013-2776?

Upgrade to a fixed version.

## Is CVE-2013-2776 being exploited?

There is no known exploitation of CVE-2013-2776 in the wild and no public exploit code.

## Other vulnerabilities in Apple Mac Os X

- [CVE-2014-7169](https://insights.sbomify.com/CVE-2014-7169/): GNU Bourne-Again Shell (Bash) Arbitrary Code Execution (critical 9.8, exploited in the wild)
- [CVE-2014-6271](https://insights.sbomify.com/CVE-2014-6271/): GNU Bourne-Again Shell (Bash) Arbitrary Code Execution (critical 9.8, exploited in the wild)
- [CVE-2012-1823](https://insights.sbomify.com/CVE-2012-1823/): PHP-CGI Query String Parameter (critical 9.8, exploited in the wild)
- [CVE-2021-30713](https://insights.sbomify.com/CVE-2021-30713/): Apple macOS Unspecified (high 7.8, exploited in the wild)
- [CVE-2019-8526](https://insights.sbomify.com/CVE-2019-8526/): Apple macOS Use-After-Free (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-2776 and fix it if it is affected.

What it is: CVE-2013-2776 is a medium-severity vulnerability in Apple Mac Os X, published on 8 Apr 2013. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2013-2776 in the wild and no public exploit code.

Affected product: Apple Mac Os X. 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-2013-2776/ (Markdown: https://insights.sbomify.com/CVE-2013-2776/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-2776
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-2776
- OSV: https://osv.dev/vulnerability/CVE-2013-2776

---
From sbomify Insights: https://insights.sbomify.com/CVE-2013-2776/
Summaries are generated and may contain mistakes; the official description above is the record.