Ubuntu update for salt

1) OS Command Injection

EUVDB-ID: #VU48204

Risk: Medium

CVSSv3.1: 7.2 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2020-16846

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: Yes

Description

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

The vulnerability exists due to improper input validation in SaltStack Salt when processing API requests. A remote attacker can send specially crafted request to the server and execute arbitrary OS commands on the target system.

Successful exploitation of the vulnerability requires that SSH client is enabled.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected package salt to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

salt-common (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6948-1

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?

Yes. This vulnerability is being exploited in the wild.

2) Incorrect default permissions

EUVDB-ID: #VU48205

Risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-17490

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 files and folders that are set by the application within the TLS module. A local user with access to the system can view contents of files and directories or modify them.

Mitigation

Update the affected package salt to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

salt-common (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6948-1

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.

3) Improper Authentication

EUVDB-ID: #VU48206

Risk: High

CVSSv3.1: 9.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2020-25592

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error when processing eauth credentials and tokens. A remote attacker can bypass authentication process and invoke Salt SSH.

Successful exploitation of the vulnerability will result in complete system compromise.

Mitigation

Update the affected package salt to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

salt-common (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6948-1

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. However, a fully functional exploit for this vulnerability is available.

4) Security restrictions bypass

EUVDB-ID: #VU50988

Risk: Medium

CVSSv3.1: 7.3 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-28243

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

Exploit availability: Yes

Description

The vulnerability allows a remote 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. A remote user can create files in any non-blacklisted directory via a command injection in a process name.

Mitigation

Update the affected package salt to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

salt-common (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6948-1

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. However, proof of concept for this vulnerability is available.

5) Improper Certificate Validation

EUVDB-ID: #VU50987

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-28972

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to absent validation of SSL/TLS certificates. A remote attacker can perform MitM attack.

Mitigation

Update the affected package salt to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

salt-common (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6948-1

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) Improper Certificate Validation

EUVDB-ID: #VU50985

Risk: Medium

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

CVE-ID: CVE-2020-35662

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to improper TLS certificate validation. A remote attacker can force the application to accept an untrusted certificate and perform MitM attack.

Mitigation

Update the affected package salt to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

salt-common (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6948-1

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.

7) Improper access control

EUVDB-ID: #VU50979

Risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:F/RL:O/RC:C]

CVE-ID: CVE-2021-25281

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: Yes

Description

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

The vulnerability exists due to improper access restrictions. The salt-api does not honor eauth credentials for the wheel_async client. A remote attacker can remotely run any wheel modules on the master.

Mitigation

Update the affected package salt to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

salt-common (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6948-1

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. However, a fully functional exploit for this vulnerability is available.

8) Path traversal

EUVDB-ID: #VU50980

Risk: Medium

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

CVE-ID: CVE-2021-25282

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

Exploit availability: Yes

Description

The vulnerability allows a remote user to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences within the salt.wheel.pillar_roots.write method. A remote user can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation

Update the affected package salt to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

salt-common (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6948-1

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. However, a fully functional exploit for this vulnerability is available.

9) Code Injection

EUVDB-ID: #VU50982

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-25283

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

The vulnerability allows a user attacker to perform server-side template injection attacks.

The vulnerability exists due to improper input validation. A remote user can send a specially crafted request and execute arbitrary code on the target system via the SaltAPI fix directory traversal in wheel.pillar_roots.write (described in #VU50980).

Mitigation

Update the affected package salt to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

salt-common (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6948-1

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.

10) Inclusion of Sensitive Information in Log Files

EUVDB-ID: #VU50983

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-25284

CWE-ID: CWE-532 - Information Exposure Through Log Files

Exploit availability: No

Description

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

The vulnerability exists due to salt.modules.cmdmod stores sensitive information, such as passwords into the /var/log/salt/minion file. A local user can read the log files and gain access to sensitive data.

Mitigation

Update the affected package salt to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

salt-common (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6948-1

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.

11) Command Injection

EUVDB-ID: #VU50984

Risk: Medium

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3148

CWE-ID: CWE-77 - Command injection

Exploit availability: No

Description

The vulnerability allows a remote user to execute arbitrary commands within the application.

The vulnerability exists due to improper input validation, related to handling single and double quotes, within the salt.utils.thin.gen_thin() function in salt/utils/thin.py. A remote user can send a specially crafted HTTP request to the SaltAPI and execute arbitrary commands.

Mitigation

Update the affected package salt to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

salt-common (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6948-1

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.

12) OS Command Injection

EUVDB-ID: #VU50981

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3197

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation within the salt-api ssh client. A remote attacker can include the ProxyCommand in an argument, or via ssh_options provided in an API request and execute arbitrary commands on the system.

Mitigation

Update the affected package salt to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 18.04

salt-common (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6948-1

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.