Уязвимость функции вызова strncpy Atftpd, связанная с выходом операции за границы буфера в памяти, позволяющая нарушителю оказать воздействие на целостность и конфиденциальность данных или вызвать отказ в обслуживании

Уязвимость функции thread_list_mutex продвинутого TFTP-сервера Atftpd, связанная с разыменованием указателя NULL, позволяющая нарушителю вызвать отказ в обслуживании

An issue was discovered in atftpd in atftp 0.7.1. A remote attacker may send a crafted packet triggering a stack-based buffer overflow due to an insecurely implemented strncpy call. The vulnerability is triggered by sending an error packet of 3 bytes or fewer. There are multiple instances of this vulnerable strncpy pattern within the code base, specifically within tftpd_file.c, tftp_file.c, tftpd_mtftp.c, and tftp_mtftp.c.

An issue was discovered in atftpd in atftp 0.7.1. It does not lock the thread_list_mutex mutex before assigning the current thread data structure. As a result, the daemon is vulnerable to a denial of service attack due to a NULL pointer dereference. If thread_data is NULL when assigned to current, and modified by another thread before a certain tftpd_list.c check, there is a crash when dereferencing current->next.