Security restrictions bypass in PostgreSQL

1) Security restrictions bypass

EUVDB-ID: #VU12652

Risk: Medium

CVSSv4.0: 5.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H/E:U/U:Green]

CVE-ID: CVE-2018-1115

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote authenticated attacker to bypass security restrictions on the target system.

The weakness exists in the pg_catalog.pg_logfile_rotate() function due to improper Access Control List (ACL) restrictions as it does not follow the same ACLs as the pg_rorate_logfile function. A remote attacker can connect to the database and cause the target software to force log rotation, write log messages across arbitrary log files or cause the service to crash.

Mitigation

Update to version 10.4 or 9.6.9.

Vulnerable software versions

PostgreSQL: 9.6.0 - 10.3

CPE2.3

• cpe:2.3:a:postgresql_global_development_group:postgresql:9.6.8:*:*:*:*:*:*:*
• cpe:2.3:a:postgresql_global_development_group:postgresql:10.3:*:*:*:*:*:*:*

External links

https://git.postgresql.org/gitweb/?p=postgresql.git&a=commitdiff&h=7b34740

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.