Vulnerability in Bareos
CVE-2020-4042
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.
EPSS: 0.010 (58.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N.
Affected products
- Bareos — versions 19.2.8, < 19.2.8
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory, Mitigation)
- security-advisories@github.com (x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-4042?
- CVE-2020-4042 is a medium-severity vulnerability in Bareos, classified under Authentication Bypass by Capture-replay. CVSS score: 6.8/10. Published 2020-07-10.
- How severe is CVE-2020-4042?
- Medium severity. CVSS v3 base score is 6.8 out of 10.