#VU12652 Security restrictions bypass in PostgreSQL - CVE-2018-1115

Vulnerability identifier: #VU12652

Vulnerability 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

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PostgreSQL
Server applications / Database software

Vendor: PostgreSQL Global Development Group

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 - 9.6.8, 10.0 - 10.3

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

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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?

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