SB2021101011 - Fedora 35 update for containerd, moby-engine
Published: October 10, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 vulnerabilities.
1) Incorrect default permissions (CVE-ID: CVE-2021-41103)
CWE-ID: CWE-276 - Incorrect Default Permissions
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to incorrect default permissions for container root directories and some plugins. When the UID of an unprivileged Linux user on the host collided with the file owner or group inside a container, the unprivileged Linux user on the host can discover, read, and modify those files.
2) Information disclosure (CVE-ID: CVE-2021-41092)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to excessive data output by the application. A remote attacker can gain unauthorized access to sensitive information on the system.
3) Improper Preservation of Permissions (CVE-ID: CVE-2021-41089)
CWE-ID: CWE-281 - Improper preservation of permissions
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to application does not properly impose security restrictions, which leads to security restrictions bypass and privilege escalation.
4) Improper Preservation of Permissions (CVE-ID: CVE-2021-41091)
CWE-ID: CWE-281 - Improper preservation of permissions
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to application does not properly impose security restrictions, which leads to security restrictions bypass and privilege escalation.
Remediation
Install update from vendor's website.