Vulnerability identifier: #VU6894

Vulnerability risk: Low

CVSSv3.1: 4.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-7486

CWE-ID: CWE-200

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 obtain potentially sensitive information on the target system.

The weakness exists due to improper implementation of pg_user_mappings access qualifications. A remote attacker with USAGE privilege on the associated foreign server can send a specially crafted request to trigger memory leak in pg_user_mappings view and disclose foreign server passwords.

Successful exploitation of the vulnerability results in information disclosure.

Mitigation
Install update from vendor's website.

Vulnerable software versions

PostgreSQL: 9.3.1 - 9.3.16, 9.2.1 - 9.2.20, 9.4.0 - 9.4.11, 9.5.1 - 9.5.6, 9.6.0 - 9.6.2, 9.1.1 - 9.1.23, 9.0.0 - 9.0.22, 8.4.1 - 8.4.19

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External links
http://www.postgresql.org/about/news/1746/

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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