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Ubuntu Security Notice USN-6948-1
August 08, 2024

salt vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Salt.

Software Description:
- salt: Infrastructure management built on a dynamic communication bus

Details:

It was discovered that Salt incorrectly handled crafted web requests.
A remote attacker could possibly use this issue to run arbitrary
commands. (CVE-2020-16846)

It was discovered that Salt incorrectly created certificates with weak
file permissions. (CVE-2020-17490)

It was discovered that Salt incorrectly handled credential validation.
A remote attacker could possibly use this issue to bypass authentication.
(CVE-2020-25592)

It was discovered that Salt incorrectly handled crafted process names.
An attacker could possibly use this issue to run arbitrary commands.
This issue only affected Ubuntu 18.04 LTS. (CVE-2020-28243)

It was discovered that Salt incorrectly handled validation of SSL/TLS
certificates. A remote attacker could possibly use this issue to spoof
a trusted entity. (CVE-2020-28972, CVE-2020-35662)

It was discovered that Salt incorrectly handled credential validation.
A remote attacker could possibly use this issue to run arbitrary code.
(CVE-2021-25281)

It was discovered that Salt incorrectly handled crafted paths. A remote
attacker could possibly use this issue to perform directory traversal.
(CVE-2021-25282)

It was discovered that Salt incorrectly handled template rendering. A
remote attacker could possibly this issue to run arbitrary code.
(CVE-2021-25283)

It was discovered that Salt incorrectly handled logging. An attacker
could possibly use this issue to discover credentials. This issue only
affected Ubuntu 18.04 LTS. (CVE-2021-25284)

It was discovered that Salt incorrectly handled crafted web requests.
A remote attacker could possibly use this issue to run arbitrary
commands. This issue only affected Ubuntu 18.04 LTS. (CVE-2021-3148)

It was discovered that Salt incorrectly handled input sanitization.
A remote attacker could possibly use this issue to run arbitrary
commands. (CVE-2021-3197)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS
   salt-common                     2017.7.4+dfsg1-1ubuntu18.04.2+esm1
                                   Available with Ubuntu Pro

Ubuntu 16.04 LTS
   salt-common                     2015.8.8+ds-1ubuntu0.1+esm2
                                   Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
   https://ubuntu.com/security/notices/USN-6948-1
   CVE-2020-16846, CVE-2020-17490, CVE-2020-25592, CVE-2020-28243,
   CVE-2020-28972, CVE-2020-35662, CVE-2021-25281, CVE-2021-25282,
   CVE-2021-25283, CVE-2021-25284, CVE-2021-3148, CVE-2021-3197