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Related Vulnerabilities: CVE-2017-7484 CVE-2017-7485 CVE-2017-7486

Selectivity estimators bypass SELECT privilege checksIt was found that some selectivity estimation functions did not check user privileges before providing information from pg_statistic, possibly leaking information. An unprivileged attacker could use this flaw to steal some information from tables they are otherwise not allowed to access. (CVE-2017-7484) libpq ignores PGREQUIRESSL environment variableIt was found that the PGREQUIRESSL was no longer enforcing a SSL/TLS connection to a PostgreSQL server. An active Man-in-the-Middle attacker could use this flaw to strip the SSL/TLS protection from a connection between a client and a server. (CVE-2017-7485) pg_user_mappings view discloses foreign server passwordsIt was found that the pg_user_mappings view from postgresql could disclose information about user mappings to a foreign database to unprivileged users. An authenticated attacker with USAGE privilege for this mapping could, when querying the view, obtain user mapping data, such as the username and password used to connect to the foreign database. (CVE-2017-7486)

Source

ALAS-2017-839

Amazon Linux AMI Security Advisory: ALAS-2017-839
Advisory Release Date: 2017-06-06 16:53 Pacific
Advisory Updated Date: 2017-06-06 22:47 Pacific

Severity: Medium

References: CVE-2017-7484 CVE-2017-7485 CVE-2017-7486

Issue Overview:

Selectivity estimators bypass SELECT privilege checks
It was found that some selectivity estimation functions did not check user privileges before providing information from pg_statistic, possibly leaking information. An unprivileged attacker could use this flaw to steal some information from tables they are otherwise not allowed to access. (CVE-2017-7484)

libpq ignores PGREQUIRESSL environment variable
It was found that the PGREQUIRESSL was no longer enforcing a SSL/TLS connection to a PostgreSQL server. An active Man-in-the-Middle attacker could use this flaw to strip the SSL/TLS protection from a connection between a client and a server. (CVE-2017-7485)

pg_user_mappings view discloses foreign server passwords
It was found that the pg_user_mappings view from postgresql could disclose information about user mappings to a foreign database to unprivileged users. An authenticated attacker with USAGE privilege for this mapping could, when querying the view, obtain user mapping data, such as the username and password used to connect to the foreign database. (CVE-2017-7486)

Affected Packages:

postgresql93, postgresql94, postgresql95

Issue Correction:
Run yum update postgresql93 to update your system.
Run yum update postgresql94 to update your system.
Run yum update postgresql95 to update your system.

New Packages:

i686:
    postgresql93-devel-9.3.17-1.63.amzn1.i686
    postgresql93-contrib-9.3.17-1.63.amzn1.i686
    postgresql93-debuginfo-9.3.17-1.63.amzn1.i686
    postgresql93-libs-9.3.17-1.63.amzn1.i686
    postgresql93-plperl-9.3.17-1.63.amzn1.i686
    postgresql93-docs-9.3.17-1.63.amzn1.i686
    postgresql93-plpython27-9.3.17-1.63.amzn1.i686
    postgresql93-plpython26-9.3.17-1.63.amzn1.i686
    postgresql93-9.3.17-1.63.amzn1.i686
    postgresql93-pltcl-9.3.17-1.63.amzn1.i686
    postgresql93-server-9.3.17-1.63.amzn1.i686
    postgresql93-test-9.3.17-1.63.amzn1.i686
    postgresql94-9.4.12-1.68.amzn1.i686
    postgresql94-docs-9.4.12-1.68.amzn1.i686
    postgresql94-plpython26-9.4.12-1.68.amzn1.i686
    postgresql94-plpython27-9.4.12-1.68.amzn1.i686
    postgresql94-libs-9.4.12-1.68.amzn1.i686
    postgresql94-test-9.4.12-1.68.amzn1.i686
    postgresql94-server-9.4.12-1.68.amzn1.i686
    postgresql94-devel-9.4.12-1.68.amzn1.i686
    postgresql94-debuginfo-9.4.12-1.68.amzn1.i686
    postgresql94-plperl-9.4.12-1.68.amzn1.i686
    postgresql94-contrib-9.4.12-1.68.amzn1.i686
    postgresql95-9.5.7-1.72.amzn1.i686
    postgresql95-debuginfo-9.5.7-1.72.amzn1.i686
    postgresql95-contrib-9.5.7-1.72.amzn1.i686
    postgresql95-static-9.5.7-1.72.amzn1.i686
    postgresql95-plperl-9.5.7-1.72.amzn1.i686
    postgresql95-plpython27-9.5.7-1.72.amzn1.i686
    postgresql95-docs-9.5.7-1.72.amzn1.i686
    postgresql95-plpython26-9.5.7-1.72.amzn1.i686
    postgresql95-test-9.5.7-1.72.amzn1.i686
    postgresql95-libs-9.5.7-1.72.amzn1.i686
    postgresql95-devel-9.5.7-1.72.amzn1.i686
    postgresql95-server-9.5.7-1.72.amzn1.i686

src:
    postgresql93-9.3.17-1.63.amzn1.src
    postgresql94-9.4.12-1.68.amzn1.src
    postgresql95-9.5.7-1.72.amzn1.src

x86_64:
    postgresql93-libs-9.3.17-1.63.amzn1.x86_64
    postgresql93-devel-9.3.17-1.63.amzn1.x86_64
    postgresql93-docs-9.3.17-1.63.amzn1.x86_64
    postgresql93-test-9.3.17-1.63.amzn1.x86_64
    postgresql93-plpython26-9.3.17-1.63.amzn1.x86_64
    postgresql93-server-9.3.17-1.63.amzn1.x86_64
    postgresql93-pltcl-9.3.17-1.63.amzn1.x86_64
    postgresql93-plpython27-9.3.17-1.63.amzn1.x86_64
    postgresql93-9.3.17-1.63.amzn1.x86_64
    postgresql93-contrib-9.3.17-1.63.amzn1.x86_64
    postgresql93-debuginfo-9.3.17-1.63.amzn1.x86_64
    postgresql93-plperl-9.3.17-1.63.amzn1.x86_64
    postgresql94-contrib-9.4.12-1.68.amzn1.x86_64
    postgresql94-plpython27-9.4.12-1.68.amzn1.x86_64
    postgresql94-plperl-9.4.12-1.68.amzn1.x86_64
    postgresql94-9.4.12-1.68.amzn1.x86_64
    postgresql94-plpython26-9.4.12-1.68.amzn1.x86_64
    postgresql94-docs-9.4.12-1.68.amzn1.x86_64
    postgresql94-server-9.4.12-1.68.amzn1.x86_64
    postgresql94-debuginfo-9.4.12-1.68.amzn1.x86_64
    postgresql94-test-9.4.12-1.68.amzn1.x86_64
    postgresql94-libs-9.4.12-1.68.amzn1.x86_64
    postgresql94-devel-9.4.12-1.68.amzn1.x86_64
    postgresql95-docs-9.5.7-1.72.amzn1.x86_64
    postgresql95-contrib-9.5.7-1.72.amzn1.x86_64
    postgresql95-test-9.5.7-1.72.amzn1.x86_64
    postgresql95-plpython27-9.5.7-1.72.amzn1.x86_64
    postgresql95-plperl-9.5.7-1.72.amzn1.x86_64
    postgresql95-server-9.5.7-1.72.amzn1.x86_64
    postgresql95-static-9.5.7-1.72.amzn1.x86_64
    postgresql95-libs-9.5.7-1.72.amzn1.x86_64
    postgresql95-debuginfo-9.5.7-1.72.amzn1.x86_64
    postgresql95-9.5.7-1.72.amzn1.x86_64
    postgresql95-plpython26-9.5.7-1.72.amzn1.x86_64
    postgresql95-devel-9.5.7-1.72.amzn1.x86_64

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