Debian update for salt

1) OS Command Injection

EUVDB-ID: #VU27599

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-2019-17361

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 attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation the salt-api NET API with the ssh client enabled. A remote unauthenticated attacker with network access to the API endpoint can pass specially crafted data to the application and execute arbitrary OS commands on the salt-api host.

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

Mitigation

Update salt package to one of the following versions: 2016.11.2+ds-1+deb9u3, 2018.3.4+dfsg1-6+deb10u1.

Vulnerable software versions

salt (Debian package): 2016.11.2+ds-1+deb9u1 - 2018.3.4~git20180207+dfsg1-1

External links

http://www.debian.org/security/2020/dsa-4676

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) Improper Authentication

EUVDB-ID: #VU27494

Risk: Critical

CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2020-11651

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 the salt-master process "ClearFuncs" class does not properly validate method calls. A remote non-authenticated attacker can bypass authentication process and gain access some methods without authentication. These methods can be used to retrieve user tokens from the salt master and/or run arbitrary commands on salt minion as root.

Note: this vulnerability is being actively exploited in the wild.

Mitigation

Update salt package to one of the following versions: 2016.11.2+ds-1+deb9u3, 2018.3.4+dfsg1-6+deb10u1.

Vulnerable software versions

salt (Debian package): 2016.11.2+ds-1+deb9u1 - 2018.3.4~git20180207+dfsg1-1

External links

http://www.debian.org/security/2020/dsa-4676

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?

Yes. This vulnerability is being exploited in the wild.

3) Path traversal

EUVDB-ID: #VU27495

Risk: Medium

CVSSv3.1: 6.2 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:H/RL:O/RC:C]

CVE-ID: CVE-2020-11652

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

Exploit availability: Yes

Description

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

The vulnerability exists due to input validation error when processing directory traversal sequences in the salt-master process ClearFuncs class. A remote authenticated attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation

Update salt package to one of the following versions: 2016.11.2+ds-1+deb9u3, 2018.3.4+dfsg1-6+deb10u1.

Vulnerable software versions

salt (Debian package): 2016.11.2+ds-1+deb9u1 - 2018.3.4~git20180207+dfsg1-1

External links

http://www.debian.org/security/2020/dsa-4676

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.