libformat is a library for the Linux operating system that intercepts, among others, calls to the printf() family of functions to prevent format string attacks, in which a possibly malicious user supplied format string is used. This is a programming error, but has recently been used to break computer security. This library can be used to protect against compromises due to yet undiscovered vulnerabilities in privileged programs. libformat checks for format strings containing the %n format specifier in writable parts of a process' address space, and if found, the process is terminated with the KILL signal.
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