USN-4459-1: Salt vulnerabilities

Releases

• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• salt - Infrastructure management built on a dynamic communication bus

Details

It was discovered that Salt allows remote attackers to determine which files
exist on the server. An attacker could use that to extract sensitive
information. (CVE-2018-15750)

It was discovered that Salt has a vulnerability that allows an user to bypass
authentication. An attacker could use that to extract sensitive information,
execute abritrary code or crash the server. (CVE-2018-15751)

It was discovered that Salt is vulnerable to command injection. This allows
an unauthenticated attacker with network access to the API endpoint to
execute arbitrary code on the salt-api host. (CVE-2019-17361)

It was discovered that Salt incorrectly validated method calls and
sanitized paths. A remote attacker could possibly use this issue to access
some methods without authentication. (CVE-2020-11651, CVE-2020-11652)

Update instructions

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

Ubuntu 18.04

• salt-api - 2017.7.4+dfsg1-1ubuntu18.04.2
• salt-common - 2017.7.4+dfsg1-1ubuntu18.04.2
• salt-master - 2017.7.4+dfsg1-1ubuntu18.04.2
• salt-minion - 2017.7.4+dfsg1-1ubuntu18.04.2

Ubuntu 16.04

• salt-api - 2015.8.8+ds-1ubuntu0.1
• salt-common - 2015.8.8+ds-1ubuntu0.1
• salt-master - 2015.8.8+ds-1ubuntu0.1
• salt-minion - 2015.8.8+ds-1ubuntu0.1

After a standard system update you need to restart salt to make all the
necessary changes.

References

• CVE-2018-15750
• CVE-2018-15751
• CVE-2019-17361
• CVE-2020-11651
• CVE-2020-11652

Related notices

• USN-4769-1: salt, salt-cloud, salt-common, salt-ssh, salt-api, salt-master, salt-syndic, salt-minion, salt-doc, salt-proxy
• USN-6849-1: salt, salt-common, salt-ssh, salt-master, salt-syndic, salt-minion, salt-doc