PT-2020-17849 · Bareos · Bareos

Arogge · Published 2020-07-10 · Updated 2020-07-15 · CVE-2020-4042

Positive Technologies (AI Summary)

CVSS v3.1

6.8

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions Bareos versions prior to 19.2.8

Description The issue 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. A 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 director's original challenge.

Recommendations For versions prior to 19.2.8, update to version 19.2.8 to resolve the issue. As a temporary workaround, consider restricting client-initiated connections to trusted clients or disabling the feature that allows the director to connect to clients itself until the update is applied.

Fix

Weakness Enumeration

CWE-294

Related Identifiers

CVE-2020-4042

GHSA-VQPJ-2VHJ-H752

Affected Products

Bareos

References · 7

• https://ubuntu.com/security/CVE-2020-4042 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-4042 · Security Note
• https://bugs.bareos.org/view.php?id=1250 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-4042 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-4042 · Security Note
• https://osv.dev/vulnerability/CVE-2020-4042 · Vendor Advisory
• https://github.com/bareos/bareos/security/advisories/GHSA-vqpj-2vhj-h752 · Note