Amazon Linux AMI update for postgresql95

Published: 2020-10-28

Risk	Medium
Patch available	YES
Number of vulnerabilities	3
CVE-ID	CVE-2019-10130 CVE-2019-10208 CVE-2020-14350
CWE-ID	CWE-264 CWE-426
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 3 vulnerabilities.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU18424

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-2019-10130

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to incorrect implementation of row security policies. A remote attacker can use statistics, generated for tables to bypass row security policies and gain access to restricted rows.

Mitigation

Update the affected packages:

i686:
    postgresql95-test-9.5.23-1.81.amzn1.i686
    postgresql95-server-9.5.23-1.81.amzn1.i686
    postgresql95-plpython26-9.5.23-1.81.amzn1.i686
    postgresql95-contrib-9.5.23-1.81.amzn1.i686
    postgresql95-static-9.5.23-1.81.amzn1.i686
    postgresql95-docs-9.5.23-1.81.amzn1.i686
    postgresql95-libs-9.5.23-1.81.amzn1.i686
    postgresql95-9.5.23-1.81.amzn1.i686
    postgresql95-debuginfo-9.5.23-1.81.amzn1.i686
    postgresql95-devel-9.5.23-1.81.amzn1.i686
    postgresql95-plpython27-9.5.23-1.81.amzn1.i686
    postgresql95-plperl-9.5.23-1.81.amzn1.i686

src:
    postgresql95-9.5.23-1.81.amzn1.src

x86_64:
    postgresql95-docs-9.5.23-1.81.amzn1.x86_64
    postgresql95-plpython27-9.5.23-1.81.amzn1.x86_64
    postgresql95-libs-9.5.23-1.81.amzn1.x86_64
    postgresql95-static-9.5.23-1.81.amzn1.x86_64
    postgresql95-test-9.5.23-1.81.amzn1.x86_64
    postgresql95-plperl-9.5.23-1.81.amzn1.x86_64
    postgresql95-plpython26-9.5.23-1.81.amzn1.x86_64
    postgresql95-9.5.23-1.81.amzn1.x86_64
    postgresql95-debuginfo-9.5.23-1.81.amzn1.x86_64
    postgresql95-server-9.5.23-1.81.amzn1.x86_64
    postgresql95-contrib-9.5.23-1.81.amzn1.x86_64
    postgresql95-devel-9.5.23-1.81.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2020-1442.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) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU20003

Risk: Low

CVSSv3.1: 3.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-10208

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to way PostreSQL processes SECURITY DEFINER functions. A privileged attacker with EXECUTE permission, which must itself contain a function call having inexact argument type match, can execute arbitrary SQL query under the identity of the function owner.

Mitigation

Update the affected packages:

i686:
    postgresql95-test-9.5.23-1.81.amzn1.i686
    postgresql95-server-9.5.23-1.81.amzn1.i686
    postgresql95-plpython26-9.5.23-1.81.amzn1.i686
    postgresql95-contrib-9.5.23-1.81.amzn1.i686
    postgresql95-static-9.5.23-1.81.amzn1.i686
    postgresql95-docs-9.5.23-1.81.amzn1.i686
    postgresql95-libs-9.5.23-1.81.amzn1.i686
    postgresql95-9.5.23-1.81.amzn1.i686
    postgresql95-debuginfo-9.5.23-1.81.amzn1.i686
    postgresql95-devel-9.5.23-1.81.amzn1.i686
    postgresql95-plpython27-9.5.23-1.81.amzn1.i686
    postgresql95-plperl-9.5.23-1.81.amzn1.i686

src:
    postgresql95-9.5.23-1.81.amzn1.src

x86_64:
    postgresql95-docs-9.5.23-1.81.amzn1.x86_64
    postgresql95-plpython27-9.5.23-1.81.amzn1.x86_64
    postgresql95-libs-9.5.23-1.81.amzn1.x86_64
    postgresql95-static-9.5.23-1.81.amzn1.x86_64
    postgresql95-test-9.5.23-1.81.amzn1.x86_64
    postgresql95-plperl-9.5.23-1.81.amzn1.x86_64
    postgresql95-plpython26-9.5.23-1.81.amzn1.x86_64
    postgresql95-9.5.23-1.81.amzn1.x86_64
    postgresql95-debuginfo-9.5.23-1.81.amzn1.x86_64
    postgresql95-server-9.5.23-1.81.amzn1.x86_64
    postgresql95-contrib-9.5.23-1.81.amzn1.x86_64
    postgresql95-devel-9.5.23-1.81.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2020-1442.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.

3) Untrusted search path

EUVDB-ID: #VU45749

Risk: Medium

CVSSv3.1: 4.1 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-14350

CWE-ID: CWE-426 - Untrusted Search Path

Exploit availability: No

Description

The vulnerability allows a remote user to escalate privileges within the database.

The vulnerability exists due to the way PostgreSQL handles CREATE EXTENSION statements. A remote user with permission to create objects in the new extension's schema or a schema of a prerequisite extension can execute arbitrary SQL functions under the identity of the superuser in certain cases.

Mitigation

Update the affected packages:

i686:
    postgresql95-test-9.5.23-1.81.amzn1.i686
    postgresql95-server-9.5.23-1.81.amzn1.i686
    postgresql95-plpython26-9.5.23-1.81.amzn1.i686
    postgresql95-contrib-9.5.23-1.81.amzn1.i686
    postgresql95-static-9.5.23-1.81.amzn1.i686
    postgresql95-docs-9.5.23-1.81.amzn1.i686
    postgresql95-libs-9.5.23-1.81.amzn1.i686
    postgresql95-9.5.23-1.81.amzn1.i686
    postgresql95-debuginfo-9.5.23-1.81.amzn1.i686
    postgresql95-devel-9.5.23-1.81.amzn1.i686
    postgresql95-plpython27-9.5.23-1.81.amzn1.i686
    postgresql95-plperl-9.5.23-1.81.amzn1.i686

src:
    postgresql95-9.5.23-1.81.amzn1.src

x86_64:
    postgresql95-docs-9.5.23-1.81.amzn1.x86_64
    postgresql95-plpython27-9.5.23-1.81.amzn1.x86_64
    postgresql95-libs-9.5.23-1.81.amzn1.x86_64
    postgresql95-static-9.5.23-1.81.amzn1.x86_64
    postgresql95-test-9.5.23-1.81.amzn1.x86_64
    postgresql95-plperl-9.5.23-1.81.amzn1.x86_64
    postgresql95-plpython26-9.5.23-1.81.amzn1.x86_64
    postgresql95-9.5.23-1.81.amzn1.x86_64
    postgresql95-debuginfo-9.5.23-1.81.amzn1.x86_64
    postgresql95-server-9.5.23-1.81.amzn1.x86_64
    postgresql95-contrib-9.5.23-1.81.amzn1.x86_64
    postgresql95-devel-9.5.23-1.81.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2020-1442.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.