Cisco released patches for two high severity vulnerabilities in Secure Client, the enterprise VPN application that also incorporates security and monitoring capabilities.
The first issue, tracked as CVE-2024-20337, impacts the Linux, macOS, and Windows versions of Secure Client and could be exploited remotely, without authentication, in carriage return line feed (CRLF) injection attacks that insufficiently validates user supplied inputs.
An attacker tricking a user to click a crafted link while establishing a VPN session could execute arbitrary scripts in the victim’s browser or access sensitive information, such as SAML tokens. The Secure Client instances where the VPN headend is configured with the SAML External Browser feature are vulnerable.
Cisco addressed the flaw with the release of Secure Client versions 4.10.08025 and 5.1.2.42, and no patches are available for version 5.0.
The second high-severity bug, tracked as CVE-2024-20338, only affects Secure Client for Linux and requires authentication for successful exploitation. Version 5.1.2.42 of the VPN application resolves the bug.
An attacker could exploit this vulnerability by copying a malicious library file to a specific directory in the filesystem and persuading an administrator to restart a specific process. A successful exploit could allow the attacker to execute arbitrary code on an affected device with root privileges.
Cisco has revealed it is not aware of any of these vulnerabilities being exploited in the wild
