#VU18664 Improper access control in Octavia - CVE-2019-3895

Vulnerability identifier: #VU18664

Vulnerability risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-3895

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Octavia
Server applications / Other server solutions

Vendor: Openstack

Description

The vulnerability allows a remote attacker to gain unauthorized access to sensitive information.

The vulnerability exists due to improper access restrictions within "_extract_amp_image_id_by_tag" in "octavia/compute/drivers/nova_driver.py" that does not filter images and used images owned by pre-defined tenant. A remote non-privileged user can tag an image with the 'amphora' tag and set it to "public=true" to gain unauthorized access to lb-mgmt network.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Octavia: 0.8.0 - 0.8.1

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External links
https://bugs.launchpad.net/octavia/+bug/1620629

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.