Privilege escalation in shadow-utils component used by BIG-IP Next for Kubernetes

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU113028

Risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-56433

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote user to escalate privileges on the system.

The vulnerability exists due to shadow-utils establishes a default /etc/subuid behavior (e.g., uid 100000 through 165535 for the first user account) that can realistically conflict with the uids of users defined on locally administered networks, potentially leading to account takeover by leveraging newuidmap for access to an NFS home directory (or same-host resources in the case of remote logins by these local network users).

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

BIG-IP Next for Kubernetes: 2.0.0

CPE2.3

• cpe:2.3:o:f5_networks:big-ip_next_for_kubernetes:2.0.0:*:*:*:*:*:*:*

External links

https://my.f5.com/manage/s/article/K000152313

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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