Heap-based buffer overflow in __zzip_get32 in fetch.c (CVE-2017-5974). Heap-based buffer overflow in __zzip_get64 in fetch.c (CVE-2017-5975). Heap-based buffer overflow in zzip_mem_entry_extra_block in memdisk.c (CVE-2017-5976). Invalid memory read in zzip_mem_entry_extra_block in memdisk.c (CVE-2017-5977). Out of bounds read in zzip_mem_entry_new in memdisk.c (CVE-2017-5978). NULL pointer dereference in prescan_entry in fseeko.c (CVE-2017-5979). NULL pointer dereference in zzip_mem_entry_new in memdisk.c (CVE-2017-5980). Assertion failure in seeko.c (CVE-2017-5981). NULL pointer dereference in main in unzzipcat-mem.c (bsc#1024532). NULL pointer dereference in main in unzzipcat.c (bsc#1024537).