Amazon Linux AMI update for postgresql92

Published: 2017-06-06

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2017-7484 CVE-2017-7486
CWE-ID	CWE-200
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Amazon Linux AMI Operating systems & Components / Operating system
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Information disclosure

EUVDB-ID: #VU6892

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-7484

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote authenticated attacker to obtain potentially sensitive information on the target system.

The weakness exists due to improper privilege checking before providing information from pg_statistic. A remote attacker can send a specially crafted request to bypass SELECT privilege checks, cause memory leak and steal some information from ostensibly restricted tables.

Successful exploitation of the vulnerability results in information disclosure.

Mitigation

Update the affected packages.

i686:
    postgresql92-plperl-9.2.21-1.60.amzn1.i686
    postgresql92-server-9.2.21-1.60.amzn1.i686
    postgresql92-libs-9.2.21-1.60.amzn1.i686
    postgresql92-9.2.21-1.60.amzn1.i686
    postgresql92-plpython26-9.2.21-1.60.amzn1.i686
    postgresql92-pltcl-9.2.21-1.60.amzn1.i686
    postgresql92-docs-9.2.21-1.60.amzn1.i686
    postgresql92-contrib-9.2.21-1.60.amzn1.i686
    postgresql92-debuginfo-9.2.21-1.60.amzn1.i686
    postgresql92-server-compat-9.2.21-1.60.amzn1.i686
    postgresql92-plpython27-9.2.21-1.60.amzn1.i686
    postgresql92-devel-9.2.21-1.60.amzn1.i686
    postgresql92-test-9.2.21-1.60.amzn1.i686

src:
    postgresql92-9.2.21-1.60.amzn1.src

x86_64:
    postgresql92-plperl-9.2.21-1.60.amzn1.x86_64
    postgresql92-libs-9.2.21-1.60.amzn1.x86_64
    postgresql92-pltcl-9.2.21-1.60.amzn1.x86_64
    postgresql92-plpython26-9.2.21-1.60.amzn1.x86_64
    postgresql92-test-9.2.21-1.60.amzn1.x86_64
    postgresql92-server-9.2.21-1.60.amzn1.x86_64
    postgresql92-9.2.21-1.60.amzn1.x86_64
    postgresql92-plpython27-9.2.21-1.60.amzn1.x86_64
    postgresql92-debuginfo-9.2.21-1.60.amzn1.x86_64
    postgresql92-server-compat-9.2.21-1.60.amzn1.x86_64
    postgresql92-contrib-9.2.21-1.60.amzn1.x86_64
    postgresql92-devel-9.2.21-1.60.amzn1.x86_64
    postgresql92-docs-9.2.21-1.60.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2017-838.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Information disclosure

EUVDB-ID: #VU6894

Risk: Low

CVSSv3.1: 4.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-7486

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote authenticated attacker to obtain potentially sensitive information on the target system.

The weakness exists due to improper implementation of pg_user_mappings access qualifications. A remote attacker with USAGE privilege on the associated foreign server can send a specially crafted request to trigger memory leak in pg_user_mappings view and disclose foreign server passwords.

Successful exploitation of the vulnerability results in information disclosure.

Mitigation

Update the affected packages.

i686:
    postgresql92-plperl-9.2.21-1.60.amzn1.i686
    postgresql92-server-9.2.21-1.60.amzn1.i686
    postgresql92-libs-9.2.21-1.60.amzn1.i686
    postgresql92-9.2.21-1.60.amzn1.i686
    postgresql92-plpython26-9.2.21-1.60.amzn1.i686
    postgresql92-pltcl-9.2.21-1.60.amzn1.i686
    postgresql92-docs-9.2.21-1.60.amzn1.i686
    postgresql92-contrib-9.2.21-1.60.amzn1.i686
    postgresql92-debuginfo-9.2.21-1.60.amzn1.i686
    postgresql92-server-compat-9.2.21-1.60.amzn1.i686
    postgresql92-plpython27-9.2.21-1.60.amzn1.i686
    postgresql92-devel-9.2.21-1.60.amzn1.i686
    postgresql92-test-9.2.21-1.60.amzn1.i686

src:
    postgresql92-9.2.21-1.60.amzn1.src

x86_64:
    postgresql92-plperl-9.2.21-1.60.amzn1.x86_64
    postgresql92-libs-9.2.21-1.60.amzn1.x86_64
    postgresql92-pltcl-9.2.21-1.60.amzn1.x86_64
    postgresql92-plpython26-9.2.21-1.60.amzn1.x86_64
    postgresql92-test-9.2.21-1.60.amzn1.x86_64
    postgresql92-server-9.2.21-1.60.amzn1.x86_64
    postgresql92-9.2.21-1.60.amzn1.x86_64
    postgresql92-plpython27-9.2.21-1.60.amzn1.x86_64
    postgresql92-debuginfo-9.2.21-1.60.amzn1.x86_64
    postgresql92-server-compat-9.2.21-1.60.amzn1.x86_64
    postgresql92-contrib-9.2.21-1.60.amzn1.x86_64
    postgresql92-devel-9.2.21-1.60.amzn1.x86_64
    postgresql92-docs-9.2.21-1.60.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2017-838.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.