Threat database

Vulnerability in the OpenSSH GSSAPI delta included in various Linux distributions. This vulnerability affects the GSSAPI patches added by various Linux distributions and does not affect the OpenSSH upstream project itself. The usage of sshpkt_disconnect() on an error, which does not terminate the process, allows an attacker to send an unexpected GSSAPI message type during the GSSAPI key exchange to the server, which will call the underlying function and continue the execution of the program without setting the related connection variables. As the variables are not initialized to NULL the code later accesses those uninitialized variables, accessing random memory, which could lead to undefined behavior. The recommended workaround is to use ssh_packet_disconnect() instead, which does terminate the process. The impact of the vulnerability depends heavily on the compiler flag hardening configuration.

An Improper Input Validation vulnerability exists in the user websocket handler of MAAS. An authenticated, unprivileged attacker can intercept a user.update websocket request and inject the is_superuser property set to true. The server improperly validates this input, allowing the attacker to self-promote to an administrator role. This results in full administrative control over the MAAS deployment.

CVE-2025-2486 is a low-severity vulnerability in Ubuntu's edk2 UEFI firmware packages that allowed unintended access to the UEFI Shell in Secure Boot environments, potentially bypassing Secure Boot restrictions. The issue stems from active debug code that permitted the UEFI Shell to run despite Secure Boot protections. Versions 2024.05-2ubuntu0.3 and 2024.02-2ubuntu0.3 disable the Shell to mitigate this risk. This vulnerability builds on an incomplete fix for CVE-2023-48733. Exploitation requires local access and user interaction, with high attack complexity and no known exploits in the wild. The vulnerability primarily affects systems running Ubuntu with affected edk2 versions, and its impact on confidentiality, integrity, and availability is limited due to the constraints on exploitation.