Improper authorization in PostgreSQL

1) Improper Authorization

EUVDB-ID: #VU25333

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-1720

CWE-ID: CWE-285 - Improper Authorization

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform unauthorized modification of data in database.

The vulnerability exists due to the ALTER ... DEPENDS ON EXTENSION sub-commands do not perform authorization checks, which can allow an unprivileged user to drop any function, procedure, materialized view, index, or trigger under certain conditions. This attack is possible if an administrator has installed an extension and an unprivileged user can CREATE, or an extension owner either executes DROP EXTENSION predictably or can be convinced to execute DROP EXTENSION.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

PostgreSQL: 9.6.0 - 12.1

CPE2.3

• cpe:2.3:a:postgresql_global_development_group:postgresql:9.6.16:*:*:*:*:*:*:*
• cpe:2.3:a:postgresql_global_development_group:postgresql:12.1:*:*:*:*:*:*:*

External links

https://www.postgresql.org/about/news/2011/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.