when configuring a key. An attacker can inject a specially-crafted value into the `default_key_id` or `key` configuration parameter to execute code with elevated privileges. Specially-crafted XCMDs can be used to cause denial of service, unauthorized access, information disclosure, and memory corruption. The trigger for this vulnerability can be found in the `testWifiAP` XCMD handler when configuring a key with a specially-crafted `default_key_id` or `key`. xtraCut, xtraCopy and xtraMove are standard Python functions. This issue can be exploited when these functions are called via an XCMD to execute code with elevated privileges.
Configuring a WPA2 Key
When setting up a wireless network, one of the most common things to do is configure a WPA2 key. In many scenarios, this involves copying the WPA2 passphrase from a configuration file and pasting it into an interactive command line tool.
The default_key_id parameter is a string which may be used as the ID of a pre-shared key (PSK). The default value is "default".
This issue can be exploited when configuring a key with specific values for the `default_key_id` and `key` parameters. For example, using "1234567890" as the value for both parameters will allow code execution with elevated privileges.
Mitigation Strategies
This issue can be mitigated by securing the `default_key_id` and `key` configuration parameters. xtraCut, xtraCopy and xtraMove are standard Python functions. This issue can be exploited when these functions are called via an XCMD to execute code with elevated privileges.
Configuring a key using xtraCut and xtraCopy:
This issue can be exploited when xtraCut, xtraCopy and xtraMove are called with a specially-crafted argument.
For example, the following XCMD will cause an attacker to execute code with elevated privileges:
/usr/bin/xcopy /tmp/test.txt /tmp/test2.txt %s
%s
The trigger for this vulnerability can be found in the `testWifiAP` XCMD handler when configuring a key with a specially-crafted `default_key_id` or `key`.
Description of the xtraCut, xtraCopy and xtraMove XCMDs
CNCF ID: 2022-35876
Access Restrictions
Certain workflows will require restricted access to the system. This is a common requirement that can be fulfilled by utilizing a key manager. However, developers often don't configure the key parameters properly, potentially leading to vulnerabilities such as this one, CVE-2022-35876.
Timeline
Published on: 10/25/2022 17:15:00 UTC
Last modified on: 10/28/2022 01:28:00 UTC