[arch-security] [ASA-201709-2] postgresql: multiple issues
anthraxx at archlinux.org
Wed Sep 6 20:37:40 UTC 2017
Arch Linux Security Advisory ASA-201709-2
Date : 2017-09-06
CVE-ID : CVE-2017-7546 CVE-2017-7547 CVE-2017-7548
Package : postgresql
Type : multiple issues
Remote : Yes
Link : https://security.archlinux.org/AVG-381
The package postgresql before version 9.6.4-1 is vulnerable to multiple
issues including information disclosure, access restriction bypass and
Upgrade to 9.6.4-1.
# pacman -Syu "postgresql>=9.6.4-1"
The problems have been fixed upstream in version 9.6.4.
- CVE-2017-7546 (authentication bypass)
It was found that authenticating to a PostgreSQL database account with
an empty password was possible despite libpq's refusal to send an empty
password. A remote attacker could potentially use this flaw to gain
access to database accounts with empty passwords.
- CVE-2017-7547 (information disclosure)
An authorization flaw was found in the way PostgreSQL handled access to
the pg_user_mappings view on foreign servers. A remote authenticated
attacker could potentially use this flaw to retrieve passwords from the
user mappings defined by the foreign server owners without actually
having the privileges to do so.
- CVE-2017-7548 (access restriction bypass)
An authorization flaw was found in the way PostgreSQL handled large
objects. A remote authenticated attacker with no privileges on a large
object could potentially use this flaw to overwrite the entire content
of the object, thus resulting in denial of service.
A remote unauthenticated attacker is be able to gain access to database
accounts with empty passwords. Additionally a remote authenticated user
may be able to perform a denial of service attack or retrieve passwords
from the user mappings.
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