CVE-2019-3786

24.04.2019, 16:29

Cloud Foundry BOSH Backup and Restore CLI, all versions prior to 1.5.0, does not check the authenticity of backup scripts in BOSH. A remote authenticated malicious user can modify the metadata file of a Bosh Backup and Restore job to request extra backup files from different jobs upon restore. The exploited hooks in this metadata script were only maintained in the cfcr-etcd-release, so clusters deployed with the BBR job for etcd in this release are vulnerable.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	7.1 HIGH	NETWORK	LOW	LOW	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
dell	CNA	7.7 HIGH	NETWORK	LOW	LOW	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVE	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 27%

Vendor	Product	Version
cloudfoundry	bosh_backup_and_restore	𝑥 < 1.5.0

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-269 - Improper Privilege Management
The software does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
CWE-345 - Insufficient Verification of Data Authenticity
The software does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

References

https://www.cloudfoundry.org/blog/cve-2019-3786