SB2020042407 - Multiple vulnerabilities in NGINX Controller
Published: April 24, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Man-in-the-Middle (MitM) attack (CVE-ID: CVE-2020-5867)
CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a man-in-the-middle (MitM) attack.
The vulnerability exists due to the NGINX Controller Agent installer script "install.sh" uses HTTP instead of HTTPS to check and install packages. A remote attacker can perform a MitM attack, intercept the insecure HTTP channel, convincingly forge any packages and get the malicious packages installed on the NGINX Plus instance.
2) Information disclosure (CVE-ID: CVE-2020-5866)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to the helper.sh script uses sensitive items as command-line arguments. A local user can gain unauthorized access to those sensitive items.
3) Man-in-the-Middle (MitM) attack (CVE-ID: CVE-2020-5865)
CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a man-in-the-middle (MitM) attack.
The vulnerability exists due to the NGINX Controller is configured to communicate with its Postgres database server over unencrypted channels. A remote attacker can perform a MitM attack, intercept communicated data and modify user entered data or run arbitrary SQL commands against the database server.
Remediation
Install update from vendor's website.