SB2021072313 - Multiple vulnerabilities in Rancher

Description

This security bulletin contains information about 3 vulnerabilities.

1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2021-31999)

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

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

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

The vulnerability exists due to a reliance on untrusted inputs in a security decision issue. A remote attacker can forge the "Impersonate-User" or "Impersonate-Group" headers and gain elevated privileges on the target system.

2) Incorrect permission assignment for critical resource (CVE-ID: CVE-2021-25318)

CWE-ID: CWE-732 - Incorrect Permission Assignment for Critical Resource

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to incorrect permission assignment for critical resource. A remote authenticated attacker can modify resources they should not have access to.

3) Improper access control (CVE-ID: CVE-2021-25320)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote authenticated attacker can make request to cloud providers by creating requests with the cloud-credential ID.

Remediation

Install update from vendor's website.

References

• https://bugzilla.suse.com/show_bug.cgi?id=1187084
• https://bugzilla.suse.com/show_bug.cgi?id=1184913
• https://bugzilla.suse.com/show_bug.cgi?id=1185514