ALAS-2017-884

Amazon Linux 1 Security Advisory: ALAS-2017-884
Advisory Release Date: 2017-08-31 16:20 Pacific
Advisory Updated Date: 2017-08-31 23:11 Pacific
Severity: Medium
Issue Overview:

pg_user_mappings view discloses passwords to users lacking server privileges:
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-2017-7547)

Empty password accepted in some authentication methods:
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-2017-7546)


Affected Packages:

postgresql93, postgresql92


Issue Correction:
Run yum update postgresql93 to update your system.
Run yum update postgresql92 to update your system.

New Packages:
i686:
    postgresql93-debuginfo-9.3.18-1.64.amzn1.i686
    postgresql93-test-9.3.18-1.64.amzn1.i686
    postgresql93-plpython27-9.3.18-1.64.amzn1.i686
    postgresql93-contrib-9.3.18-1.64.amzn1.i686
    postgresql93-9.3.18-1.64.amzn1.i686
    postgresql93-devel-9.3.18-1.64.amzn1.i686
    postgresql93-docs-9.3.18-1.64.amzn1.i686
    postgresql93-pltcl-9.3.18-1.64.amzn1.i686
    postgresql93-plpython26-9.3.18-1.64.amzn1.i686
    postgresql93-libs-9.3.18-1.64.amzn1.i686
    postgresql93-server-9.3.18-1.64.amzn1.i686
    postgresql93-plperl-9.3.18-1.64.amzn1.i686
    postgresql92-server-9.2.22-1.61.amzn1.i686
    postgresql92-plpython27-9.2.22-1.61.amzn1.i686
    postgresql92-debuginfo-9.2.22-1.61.amzn1.i686
    postgresql92-contrib-9.2.22-1.61.amzn1.i686
    postgresql92-9.2.22-1.61.amzn1.i686
    postgresql92-plpython26-9.2.22-1.61.amzn1.i686
    postgresql92-docs-9.2.22-1.61.amzn1.i686
    postgresql92-libs-9.2.22-1.61.amzn1.i686
    postgresql92-devel-9.2.22-1.61.amzn1.i686
    postgresql92-pltcl-9.2.22-1.61.amzn1.i686
    postgresql92-plperl-9.2.22-1.61.amzn1.i686
    postgresql92-server-compat-9.2.22-1.61.amzn1.i686
    postgresql92-test-9.2.22-1.61.amzn1.i686

src:
    postgresql93-9.3.18-1.64.amzn1.src
    postgresql92-9.2.22-1.61.amzn1.src

x86_64:
    postgresql93-plpython26-9.3.18-1.64.amzn1.x86_64
    postgresql93-pltcl-9.3.18-1.64.amzn1.x86_64
    postgresql93-devel-9.3.18-1.64.amzn1.x86_64
    postgresql93-libs-9.3.18-1.64.amzn1.x86_64
    postgresql93-plpython27-9.3.18-1.64.amzn1.x86_64
    postgresql93-plperl-9.3.18-1.64.amzn1.x86_64
    postgresql93-contrib-9.3.18-1.64.amzn1.x86_64
    postgresql93-9.3.18-1.64.amzn1.x86_64
    postgresql93-server-9.3.18-1.64.amzn1.x86_64
    postgresql93-debuginfo-9.3.18-1.64.amzn1.x86_64
    postgresql93-test-9.3.18-1.64.amzn1.x86_64
    postgresql93-docs-9.3.18-1.64.amzn1.x86_64
    postgresql92-contrib-9.2.22-1.61.amzn1.x86_64
    postgresql92-test-9.2.22-1.61.amzn1.x86_64
    postgresql92-pltcl-9.2.22-1.61.amzn1.x86_64
    postgresql92-libs-9.2.22-1.61.amzn1.x86_64
    postgresql92-server-compat-9.2.22-1.61.amzn1.x86_64
    postgresql92-server-9.2.22-1.61.amzn1.x86_64
    postgresql92-plperl-9.2.22-1.61.amzn1.x86_64
    postgresql92-9.2.22-1.61.amzn1.x86_64
    postgresql92-devel-9.2.22-1.61.amzn1.x86_64
    postgresql92-debuginfo-9.2.22-1.61.amzn1.x86_64
    postgresql92-plpython26-9.2.22-1.61.amzn1.x86_64
    postgresql92-docs-9.2.22-1.61.amzn1.x86_64
    postgresql92-plpython27-9.2.22-1.61.amzn1.x86_64

Additional References

Red Hat: CVE-2017-7546, CVE-2017-7547

Mitre: CVE-2017-7546, CVE-2017-7547