# CVE-2018-20781: Information disclosure in n/a

> An attacker with local access can read user passwords in cleartext from a spawned process in GNOME Keyring.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 12 Feb 2019
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2018-20781, GHSA-rqh7-8g2w-wcqc, MGASA-2019-0111, UBUNTU-CVE-2018-20781, USN-3894-1

## What is CVE-2018-20781?

CVE-2018-20781 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 12 Feb 2019. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In pam/gkr-pam-module.c in GNOME Keyring before 3.27.2, the user's password is kept in a session-child process spawned from the LightDM daemon. This can expose the credential in cleartext.

Weakness: CWE-522 (Insufficiently Protected Credentials)

## Which versions are affected by CVE-2018-20781?

It affects 3 products.


Products: Canonical Ubuntu Linux, Gnome Gnome Keyring, Oracle Zfs Storage Appliance Kit.

## How do I fix CVE-2018-20781?

Upgrade to a fixed version.

## Is CVE-2018-20781 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-20781 exists.

Public exploit code:

- MimiPenguin (metasploit)

## 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-2018-20781 and fix it if it is affected.

What it is: CVE-2018-20781 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 12 Feb 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-20781 exists.

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-2018-20781/ (Markdown: https://insights.sbomify.com/CVE-2018-20781/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-20781
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-20781
- OSV: https://osv.dev/vulnerability/CVE-2018-20781

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-20781/
Summaries are generated and may contain mistakes; the official description above is the record.