TI-2024-30156 Aliases CVE-2024-45044

Bareos's negative command ACLs can be circumvented by abbreviating commands

MEDIUM 41CWE-285Published 2024-09-10 · Updated 2024-09-10

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-285.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00531 45th percentileScored 2026-11-07

Fix Fixed bareos (bareos): 23.0.4, 22.1.6, 21.1.11

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
bareos	bareos	23.0.0 to before 23.0.4; 22.0.0 to before 22.1.6; before 21.1.11	23.0.4, 22.1.6, 21.1.11	Patch available	CNA

bareos Vendorbareos Affected 23.0.0 to before 23.0.4; 22.0.0 to before 22.1.6; before 21.1.11 Fixed in 23.0.4, 22.1.6, 21.1.11 Patch available CNA

CPE names CISA-ADP · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:bareos:bareos::::::::	—	—	bareos

cpe:2.3:a:bareos:bareos:*:*:*:*:*:*:*:* Versions — — ·bareos

Remediation

Fix · CNA bareos (bareos) Fixed in 23.0.4, 22.1.6, 21.1.11

Timeline

2026-10-02 Threatist record created from CVE-2024-45044

References

Other 3

TI-2022-08569 Incorrect Authorization in Bareos Director CVSS 3.1CRITICAL 9.8
TI-2022-08570 Missing Release of Memory after Effective Lifetime in Bareos Director CVSS 3.1HIGH 7.5
TI-2020-08935 Heap-based Buffer Overflow in Bareos Director CVSS 3.1HIGH 7.4
TI-2017-10707 bareos-dir, bareos-fd, and bareos-sd in bareos-core in Bareos 16.2.6 and earlier create a… CVSS 3.0HIGH 7.8
TI-2020-03531 Authentication bypass in Bareos CVSS 3.1MEDIUM 6.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences