Description
An authenticated user could create a stack-based buffer overflow by
changing their own password to a purpose-crafted value. In addition to
the ability to crash the PostgreSQL server, this could be further
exploited to execute arbitrary code as the PostgreSQL operating system
account.
Additionally, a rogue server could send a specifically crafted message
during the SCRAM authentication process and cause a libpq-enabled client
to either crash or execute arbitrary code as the client's operating
system account. (CVE-2019-10164)
More than 25 other bugs have been fixed too, see referenced release
notes.