PostgreSQL INSERT … ON CONFLICT DO UPDATE Improper Authorization Vulnerability [CVE-2018-10925]
CVE Number – CVE-2018-10925
A vulnerability in PostgreSQL could allow an authenticated, remote attacker to gain unauthorized access to a targeted system.
The vulnerability is due to improper authorization checks of statements involving INSERT … ON CONFLICT DO UPDATE by the affected software. An attacker with CREATE TABLE privileges could exploit this vulnerability on a targeted system. A successful exploit could allow the attacker to gain unauthorized access, which could be used to read arbitrary server memory. An attacker who also has INSERT and UPDATE privileges could conduct further attacks.
PostgreSQL has confirmed the vulnerability and released software updates.
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To exploit this vulnerability, the attacker must have user-level access to the targeted system. This access requirement could reduce the likelihood of a successful exploit.
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Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to run both firewall and antivirus applications to minimize the potential of inbound and outbound threats.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators can help protect affected systems from external attacks by using a solid firewall strategy.
Administrators are advised to monitor affected systems.
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PostgreSQL has released a security issue update at the following link: CVE-2018-10925
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PostgreSQL has released software updates at the following links: PostgreSQL Downloads
Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.