SB2017100802 - Gentoo update for PostgreSQL
Published: October 8, 2017
Security Bulletin ID
SB2017100802
Severity
Low
Patch available
YES
Number of vulnerabilities
6
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 secuirty vulnerabilities.
1) Information disclosure (CVE-ID: CVE-2017-7484)
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.
2) Man-in-the-middle attack (CVE-ID: CVE-2017-7485)
The vulnerability allows a remote attacker to conduct a man-in-the-middle attack.The weakness exists in the PGREQUIRESSL environment due to no enforcement of a SSL/TLS connection to a PostgreSQL server. A remote attacker can launch a man-in-the-middle attack to strip the SSL/TLS protection from a connection between a client and a server and modify the communicated data.
Successful exploitation of the vulnerability results in unauthorized access to sensitive information.
3) Information disclosure (CVE-ID: CVE-2017-7486)
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.
4) Authentication bypass (CVE-ID: CVE-2017-7546)
The vulnerability allows a remote attacker to bypass authentication on the target system.The weakness exists in the systems using libpq or a libpq-based connection driver to perform password-based authentication methods due to insufficient security restrictions. A remote attacker can submit an empty password to disable password login and log in to the system.
Successful exploitation of the vulnerability may result in unauthorized access to the system and further attacks.
5) Information disclosure (CVE-ID: CVE-2017-7547)
The vulnerability allows a remote authenticated attacker to obtain potentially sensitive information on the target system.The weakness exists in the pg_user_mappings function due to insufficient security restrictions. A remote attacker can gain access to important data and conduct further attacks.
6) Denial of service (CVE-ID: CVE-2017-7548)
The vulnerability allows a remote authenticated attacker to cause DoS condition on the target system.The weakness exists due to an access control flaw in the lo_put() function to change the data in a large object. A remote attacker can cause the application to crash.
Remediation
Install update from vendor's website.