Authentication bypass in PostgreSQL - CVE-2017-7546

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU7873

Authentication bypass in PostgreSQL - CVE-2017-7546

Published: August 15, 2017


Vulnerability identifier: #VU7873
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-7546
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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.

Affected software

PostgreSQL
Arch Linux
Amazon Linux AMI
Debian Linux
Gentoo Linux
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux EUS Compute Node
SUSE Linux
Ubuntu
Fedora
Opensuse
postgresql (Alpine package)
postgresql
rh-postgresql95-postgresql (Red Hat package)
mingw-postgresql

How to mitigate CVE-2017-7546

The vulnerability is addressed in the following versions: 9.2.22, 9.3.18, 9.4.13, 9.5.8, 9.6.4.

postgresql (Alpine package) - update to 9.4.13-r0
postgresql - addressed in versions 9.5.8-1.fc25, 9.6.4-1.fc26
rh-postgresql95-postgresql (Red Hat package) - addressed in versions 9.5.9-1.el6, 9.5.9-1.el7
mingw-postgresql - update to 9.6.4-1.fc26

External References

Related Security Bulletins