It was found that PostgreSQL versions before 12.4, before 11.9 and before 10.14 did not properly sanitize the search_path during logical replication. An authenticated attacker could use this flaw in an attack similar to CVE-2018-1058, in order to execute arbitrary SQL command in the context of the user used for replication.
References
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00044.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00049.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00050.html
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00003.html
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00008.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1865744
- https://security.gentoo.org/glsa/202008-13
- https://security.netapp.com/advisory/ntap-20200918-0002/
- https://usn.ubuntu.com/4472-1/