Multiple vulnerabilities in PostgreSQL

Published: 2020-11-16

Risk	Medium
Patch available	YES
Number of vulnerabilities	3
CVE-ID	CVE-2020-25695 CVE-2020-25694 CVE-2020-25696
CWE-ID	CWE-89 CWE-284 CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	PostgreSQL Server applications / Database software
Vendor	PostgreSQL Global Development Group

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) SQL injection

EUVDB-ID: #VU48436

Risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-25695

CWE-ID: CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary SQL queries in database.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote authenticated attacker can send a specially crafted request to the affected application and execute arbitrary SQL commands within the application database.

Successful exploitation of this vulnerability may allow a remote attacker to read, delete, modify data in database and gain complete control over the affected application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

PostgreSQL: 9.5.0 - 13.0

CPE2.3

External links

http://bugzilla.redhat.com/show_bug.cgi?id=1894425
http://www.postgresql.org/about/news/postgresql-131-125-1110-1015-9620-and-9524-released-2111/

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.

2) Improper access control

EUVDB-ID: #VU48437

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-25694

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote attacker can perform a man-in-the-middle attack or observe clear-text transmissions and downgrade connection security settings.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

PostgreSQL: 9.5.0 - 13.0

CPE2.3

External links

http://bugzilla.redhat.com/show_bug.cgi?id=1894423
http://www.postgresql.org/about/news/postgresql-131-125-1110-1015-9620-and-9524-released-2111/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker 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.

3) Input validation error

EUVDB-ID: #VU48438

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-25696

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the "\gset" meta-command does not distinguish variables that control psql behavior. A remote attacker can execute arbitrary code as the operating system account.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

PostgreSQL: 9.5.0 - 13.0

CPE2.3

External links

http://www.postgresql.org/about/news/postgresql-131-125-1110-1015-9620-and-9524-released-2111/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker 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.