SUSE update for containerd, docker, runc

1) Command injection

EUVDB-ID: #VU16545

Risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-16873

CWE-ID: CWE-77 - Command injection

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary commands on the target system.

The vulnerability exists in the go get command due to import path of a malicious Go package, or a package that imports it directly or indirectly. A remote unauthenticated attacker can use a vanity import path that ends with "/.git", use custom domains to arrange things so that a Git repository is cloned to a folder named ".git", trick the victim into considering the parent directory as a repository root, and run Git commands on it that will use the "config" file in the original Git repository root for its configuration, and if that config file contains malicious commands, and execute arbitrary code on the system running "go get -u".

Successful exploitation of this vulnerability may result in complete compromise of vulnerable 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 1.0.0~rc93-16.8.1

runc: before 1.0.0~rc93-16.8.1

docker-debuginfo: before 20.10.6_ce-98.66.1

docker: before 20.10.6_ce-98.66.1

containerd: before 1.4.4-16.38.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211458-1/

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.

2) Path traversal

EUVDB-ID: #VU16544

Risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-16874

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to conduct a directory traversal attack on the target system.

The vulnerability exists in the go get command due to path traversal attack when the affected software executes the go get command with the import path of a Go package that contains curly braces. A remote unauthenticated attacker can execute the go get command, trick the victim into accessing a Go package that submits malicious input, conduct a directory traversal attack, which the attacker can use to execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable 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 1.0.0~rc93-16.8.1

runc: before 1.0.0~rc93-16.8.1

docker-debuginfo: before 20.10.6_ce-98.66.1

docker: before 20.10.6_ce-98.66.1

containerd: before 1.4.4-16.38.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211458-1/

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 input validation

EUVDB-ID: #VU16546

Risk: Low

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

CVE-ID: CVE-2018-16875

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists on Go TLS servers accepting client certificates and TLS clients due to the crypto/x509 package does not limit the amount of work performed for each chain verification. A remote unauthenticated attacker can craft pathological inputs leading to a CPU denial of service.

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 1.0.0~rc93-16.8.1

runc: before 1.0.0~rc93-16.8.1

docker-debuginfo: before 20.10.6_ce-98.66.1

docker: before 20.10.6_ce-98.66.1

containerd: before 1.4.4-16.38.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211458-1/

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.

4) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU22482

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-16884

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

Exploit availability: No

Description

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

The vulnerability exists due to incorrect checking of the mount targets in libcontainer/rootfs_linux.go in runc. A local user can bypass AppArmor restrictions and perform unauthorized actions on the system, as demonstrated by overwriting the /proc directory with a malicious Doker image.

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 1.0.0~rc93-16.8.1

runc: before 1.0.0~rc93-16.8.1

docker-debuginfo: before 20.10.6_ce-98.66.1

docker: before 20.10.6_ce-98.66.1

containerd: before 1.4.4-16.38.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211458-1/

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.

5) Improper access control

EUVDB-ID: #VU25847

Risk: Low

CVSSv3.1: 6 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-19921

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a local user to gain unauthorized access to sensitive information.

The vulnerability exists due to improper access restrictions, related to libcontainer/rootfs_linux.go in runc. A local user with ability to spawn two containers with custom volume-mount configurations, and run custom images can escalate privileges 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 1.0.0~rc93-16.8.1

runc: before 1.0.0~rc93-16.8.1

docker-debuginfo: before 20.10.6_ce-98.66.1

docker: before 20.10.6_ce-98.66.1

containerd: before 1.4.4-16.38.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211458-1/

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.

6) Privilege escalation

EUVDB-ID: #VU17474

Risk: Medium

CVSSv3.1: 7.6 [CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2019-5736

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

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to gain elevated privileges.

The weakness exists in the runc container runtime due to file-descriptor mishandling, related to /proc/self/exe. A remote attacker can leverage the ability to execute a command as root within one of these types of containers: (1) a new container with an attacker-controlled image, or (2) an existing container, to which the attacker previously had write access, that can be attached with docker exec, overwrite the host runc binary with minimal user interaction and execute arbitrary code with root privileges.

Successful exploitation of the vulnerability may result in system compromise.

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 1.0.0~rc93-16.8.1

runc: before 1.0.0~rc93-16.8.1

docker-debuginfo: before 20.10.6_ce-98.66.1

docker: before 20.10.6_ce-98.66.1

containerd: before 1.4.4-16.38.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211458-1/

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, a fully functional exploit for this vulnerability is available.

7) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU50273

Risk: Medium

CVSSv3.1: 7 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-21284

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

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly impose security restrictions when using the --userns-remap option. A remote authenticated attacker on the local network can send a specially crafted request and gain elevated privileges as root 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 1.0.0~rc93-16.8.1

runc: before 1.0.0~rc93-16.8.1

docker-debuginfo: before 20.10.6_ce-98.66.1

docker: before 20.10.6_ce-98.66.1

containerd: before 1.4.4-16.38.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211458-1/

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.

8) Resource exhaustion

EUVDB-ID: #VU50274

Risk: Medium

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

CVE-ID: CVE-2021-21285

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can trick a victim to pull a specially crafted Docker image, trigger resource exhaustion and perform a denial of service (DoS) attack.

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 1.0.0~rc93-16.8.1

runc: before 1.0.0~rc93-16.8.1

docker-debuginfo: before 20.10.6_ce-98.66.1

docker: before 20.10.6_ce-98.66.1

containerd: before 1.4.4-16.38.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211458-1/

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.

9) Resource management error

EUVDB-ID: #VU51242

Risk: Medium

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

CVE-ID: CVE-2021-21334

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows an attacker to gain access to potentially sensitive information.

The vulnerability exists due to incorrect management of internal resources. Containers launched through containerd's CRI implementation (through Kubernetes, crictl, or any other pod/container client that uses the containerd CRI service) that share the same image may receive incorrect environment variables, including values that are defined for other containers. If the affected containers have different security contexts, this may allow sensitive information to be unintentionally shared.

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 1.0.0~rc93-16.8.1

runc: before 1.0.0~rc93-16.8.1

docker-debuginfo: before 20.10.6_ce-98.66.1

docker: before 20.10.6_ce-98.66.1

containerd: before 1.4.4-16.38.1

External links

http://www.suse.com/support/update/announcement/2021/suse-su-20211458-1/

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.