SB2024020243 - SUSE update for openconnect
Published: February 2, 2024
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Cleartext storage of sensitive information (CVE-ID: CVE-2018-20319)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to OpenConnect VPN client stores credentials in an insecure manner in memory. A local user can read credentials from memory in plain text.
2) Man-in-the-Middle (MitM) attack (CVE-ID: CVE-2020-12105)
The vulnerability allows a remote attacker to perform a Man-in-the-Middle attack.
The vulnerability exists due to OpenConnect mishandles negative return values from X509_check_ function calls. A remote attacker can perform a Man-in-the-Middle (MitM) attack and gain access to data, transferred via VPN connection.
3) Buffer overflow (CVE-ID: CVE-2020-12823)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary within the get_cert_name() function in gnutls.c. A remote attacker can trick the victim to connect to a malicious VPN server, trigger buffer overflow and crash the client or execute arbitrary code on the system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
4) Buffer overflow (CVE-ID: CVE-2019-16239)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary in the process_http_response when processing HTTP responses. A remote attacker that controls a malicious HTTP server can trick the victim to visit a malicious website, send an HTTP response with crafted chunk sizes for HTTP chunked encoding, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.