CVE-2018-10925

Se ha descubierto que las versiones anteriores a la 10.5, 9.6.10, 9.5.14, 9.4.19 y 9.3.24 de PostgreSQL no comprobaron correctamente la autorización de ciertas instrucciones relacionadas con "INSERT ... ON CONFLICT DO UPDATE". Un atacante con privilegios "CREATE TABLE" podría explotar esta vulnerabilidad para leer bytes arbitrarios de la memoria del servidor. Si el atacante tiene también determinados privilegios "INSERT" y privilegios limitados "UPDATE" en una tabla en concreto, podría explotar esta vulnerabilidad para actualizar otras columnas en la misma tabla.

It was discovered that PostgreSQL failed to properly check authorization on certain statements involved with "INSERT ... ON CONFLICT DO UPDATE". An attacker with "CREATE TABLE" privileges could exploit this to read arbitrary bytes server memory. If the attacker also had certain "INSERT" and limited "UPDATE" privileges to a particular table, they could exploit this to update other columns in the same table.

Andrew Krasichkov discovered that the PostgreSQL client library incorrectly reset its internal state between connections. A remote attacker could possibly use this issue to bypass certain client-side connection security features. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. It was discovered that PostgreSQL incorrectly checked authorization on certain statements. A remote attacker could possibly use this issue to read arbitrary server memory or alter certain data. Various other issues were also addressed.