An insufficient input validation leading to memory overread in Citrix NetScaler ADC and Citrix NetScaler Gateway when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server may allow unauthenticated remote attackers to exfiltrate cookies, session IDs, or passwords from the target application. The vulnerability is reached via the /p/u/doAuthentication.do endpoint. This module will attempt to trigger the vulnerability to determine if the target system is vulnerable.
The ioctl handler in the atkbd keyboard driver in FreeBSD is prone to a signedness error, which can lead to a buffer overflow in the kernel when processing a SETFKEY ioctl message with specially crafted values. This vulnerability can be exploited by a local unprivileged attacker to gain root privileges. In order to reach the vulnerable code in the keyboard driver, the exploit needs a virtual terminal (/dev/ttyv*) allocated for the user under which the initial agent is running. Virtual terminals are allocated when a user logs into the physical machine, as opposed to the pseudo-terminals (/dev/pts/*) which are allocated when accessing a system via a SSH shell, for example. This module can be configured to keep waiting for an accessible virtual terminal, by setting the Advanced/TIME LIMIT parameter to the desired maximum amount of minutes to wait for.
The amd64_set_ldt() function in sys/amd64/amd64/sys_machdep.c in the FreeBSD kernel code is prone to an integer signedness error when processing a system call with specially crafted parameters originated from user space. This issue ultimately leads to a kernel heap overflow, which can be used by unprivileged local attackers to cause a kernel panic and crash the machine.