OpenWrt vulnerabilities

OpenWrt prior to version 25.12.5 has a vulnerability in the cgi-download handler in cgi-io that allows reading root-readable files including /etc/shadow via path traversal using an allowed wildcard prefix followed by ../.

In OpenWrt before v25.12.5, an integer underflow in the handle_send_a() function of the Emergency Access Daemon allows any unauthenticated attacker on the local network to crash the daemon by sending a single crafted UDP packet. The issue is fixed in v25.12.5.

Prior to version 24.10.4, ubusd in OpenWrt contains a heap buffer overflow in the event registration parsing code. This allows an attacker to modify the head and potentially execute arbitrary code in the context of the ubus daemon; the affected code runs before ACL checks, so all ubus clients can send such messages. The crafted subscription also bypasses the listen ACL. This is fixed in OpenWrt 24.10.4.

In OpenWrt prior to 24.10.4, local users could read and write arbitrary kernel memory using ioctls of the ltq-ptm driver (affects lantiq target with xrx200, danube, and amazon SoCs in PTM mode). This could allow escaping a ujail sandbox or other containers; no workarounds exist.