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Vulnerability · Published Jul 10, 2020 · Assigned by GitHub_M

CVE-2020-4042Authentication bypass in Bareos

Medium 6.8

In plain English

A medium-severity security flaw in bareos from bareos. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 62% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.8Medium
Exploit odds (30 days)1.0%top 37.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20bareos19.2.8-r0ALPINE-CVE-2020-4042
Alpine:v3.21bareos19.2.8-r0ALPINE-CVE-2020-4042
Alpine:v3.22bareos19.2.8-r0ALPINE-CVE-2020-4042
Alpine:v3.23bareos19.2.8-r0ALPINE-CVE-2020-4042
Alpine:v3.24bareos19.2.8-r0ALPINE-CVE-2020-4042

Affected products (as reported)

VendorProductVersions
bareos bareos < 19.2.8

Weakness: CWE-294 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N

References