Vulnerability Details

PostgreSQL Privilege Escalation Vulnerability-Dec17 (Linux)

Published: 2017-12-04 11:28:49
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:L/AC:L/Au:N/C:C/I:C/A:C

Detection Type:
Remote Banner Unreliable

Summary:
This host is running PostgreSQL and is prone to a privilege escalation vulnerability.

Detection Method:
Checks if a vulnerable version is present on the target host.

Technical Details:
The flaw exists as PostgreSQL runs under a non-root operating system account, and database superusers have effective ability to run arbitrary code under that system account. PostgreSQL provides a script for starting the database server during system boot. Packages of PostgreSQL for many operating systems provide their own, Linux Distribution Packager-authored startup implementations. Several implementations use a log file name that the database superuser can replace with a symbolic link. As root, they open(), chmod() and/or chown() this log file name. This often suffices for the database superuser to escalate to root privileges when root starts the server.

Impact:
Successful exploitation will allow a local user to modify files on the target system.

Affected Versions:
PostgreSQL version 9.2.x before 9.2.24, 9.3.x before 9.3.20, 9.4.x before 9.4.15, 9.5.x before 9.5.10, 9.6.x before 9.6.6 and 10.x before 10.1 on Linux.

Recommendations:
Upgrade to PostgreSQL version 10.1 or 9.6.6 or 9.5.10 or 9.4.15 or 9.3.20 or 9.2.24 or later.

Solution Type:
Vendor Patch

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2017-12172

SecurityFocus Bugtraq ID:

https://www.securityfocus.com/bid/101949

References:

https://www.postgresql.org/about/news/1801
https://www.postgresql.org/support/security
http://www.postgresql.org/download

Severity
High
CVSS Score
7.2
Published
2017-12-04
Modified
2018-10-29
Category
Databases

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