A Denial of Service vulnerability has been discovered in the ptrace() call on the amd64 platform. By calling ptrace() with specially crafted (“non-canonical”) addresses, a local attacker could cause the kernel to crash. This only affects the amd64 platform. (CAN-2005-1762)
ZouNanHai discovered that a local user could hang the kernel by invoking syscall() with specially crafted arguments. This only affects the amd64 platform when running in the 32 bit compatibility mode. (CAN-2005-1765)
27 June 2005
A security issue affects these releases of Ubuntu and its derivatives:
A Denial of Service vulnerability has been discovered in the ptrace() call on the amd64 platform. By calling ptrace() with specially crafted (“non-canonical”) addresses, a local attacker could cause the kernel to crash. This only affects the amd64 platform. (CAN-2005-1762)
ZouNanHai discovered that a local user could hang the kernel by invoking syscall() with specially crafted arguments. This only affects the amd64 platform when running in the 32 bit compatibility mode. (CAN-2005-1765)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.