Authentication bypass in Bareos
Priority LOW 32CWE-294Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-294.
Summary
Bareos before version 19.2.8 and earlier allows a malicious client to communicate with the director without knowledge of the shared secret if the director allows client initiated connection and connects to the client itself. The malicious client can replay the Bareos director's cram-md5 challenge to the director itself leading to the director responding to the replayed challenge. The response obtained is then a valid reply to the directors original challenge. This is fixed in version 19.2.8.
Why it matters now
EPSS 0.00971 62nd percentileScored 2026-11-07
Fix Fixed bareos (bareos): 19.2.8
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| bareos | bareos | before 19.2.8 | 19.2.8 | Patch available | CNA |
- bareos Vendorbareos Affected before 19.2.8 Fixed in 19.2.8 Patch available CNA
Remediation
- Fix · CNA bareos (bareos) Fixed in 19.2.8
Timeline
- 2026-10-02 Threatist record created from CVE-2020-4042
References
More Bareos vulnerabilities
- 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
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences