SUSE update for containerd, docker, runc

1) Security features bypass

EUVDB-ID: #VU53399

Risk: Low

CVSSv3.1: 6.6 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-30465

CWE-ID: CWE-254 - Security Features

Exploit availability: No

Description

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

The vulnerability exists due to the security features bypass issue. A remote authenticated attacker on the local network can perform a symlink exchange attack and host filesystem being bind-mounted into the container.

Mitigation

Update the affected package containerd, docker, runc to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Containers: 12

runc-debuginfo: before 1.0.2-16.14.1

runc: before 1.0.2-16.14.1

containerd: before 1.4.11-16.45.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20213336-1/

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.

2) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU54999

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-32760

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

Exploit availability: No

Description

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

The vulnerability exists due to archive package allows chmod of file outside of unpack target directory. A remote attacker can deny access to the expected owner of the file, widen access to others, or set extended bits like setuid, setgid, and sticky.

Mitigation

Update the affected package containerd, docker, runc to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Containers: 12

runc-debuginfo: before 1.0.2-16.14.1

runc: before 1.0.2-16.14.1

containerd: before 1.4.11-16.45.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20213336-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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

3) Improper Preservation of Permissions

EUVDB-ID: #VU64415

Risk: Low

CVSSv3.1: 5.5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-41089

CWE-ID: CWE-281 - Improper preservation of permissions

Exploit availability: No

Description

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.

Mitigation

Update the affected package containerd, docker, runc to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Containers: 12

runc-debuginfo: before 1.0.2-16.14.1

runc: before 1.0.2-16.14.1

containerd: before 1.4.11-16.45.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20213336-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

4) Improper Preservation of Permissions

EUVDB-ID: #VU64416

Risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:P/RL:O/RC:C]

CVE-ID: CVE-2021-41091

CWE-ID: CWE-281 - Improper preservation of permissions

Exploit availability: Yes

Description

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.

Mitigation

Update the affected package containerd, docker, runc to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Containers: 12

runc-debuginfo: before 1.0.2-16.14.1

runc: before 1.0.2-16.14.1

containerd: before 1.4.11-16.45.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20213336-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

5) Information disclosure

EUVDB-ID: #VU64417

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-41092

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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.

Mitigation

Update the affected package containerd, docker, runc to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Containers: 12

runc-debuginfo: before 1.0.2-16.14.1

runc: before 1.0.2-16.14.1

containerd: before 1.4.11-16.45.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20213336-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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

6) Incorrect default permissions

EUVDB-ID: #VU57038

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-41103

CWE-ID: CWE-276 - Incorrect Default Permissions

Exploit availability: No

Description

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.

Mitigation

Update the affected package containerd, docker, runc to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Module for Containers: 12

runc-debuginfo: before 1.0.2-16.14.1

runc: before 1.0.2-16.14.1

containerd: before 1.4.11-16.45.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20213336-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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