CVE-2019-10208

Given a suitable SECURITY DEFINER function, an attacker can execute arbitrary SQL under the identity of the function owner. An attack requires EXECUTE permission on the function, which must itself contain a function call having inexact argument type match. For example, length('foo'::varchar) and length('foo') are inexact, while length('foo'::text) is exact. As part of exploiting this vulnerability, the attacker uses CREATE DOMAIN to create a type in a pg_temp schema. The attack pattern and fix are similar to that for CVE-2007-2138 . Writing SECURITY DEFINER functions continues to require following the considerations noted in the documentation: https://www.postgresql.org/docs/current/sql-createfunction.html#SQL-CREATEFUNCTION-SECURITY The PostgreSQL project thanks Tom Lane for reporting this problem.

Version Information

CVSS 3.0

Overall Score	7.5
Component	core server
Vector	AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

First published: 2019-08-08

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