Multiple stack-based buffer overflows in sgminer before 4.2.2, cgminer before 4.3.5, and BFGMiner before 3.3.0 allow remote pool servers to have unspecified impact via a long URL in a client.reconnect stratum message to the (1) extract_sockaddr or (2) parse_reconnect functions in util.c.

The parse_notify function in util.c in sgminer before 4.2.2 and cgminer 3.3.0 through 4.0.1 allows man-in-the-middle attackers to cause a denial of service (application exit) via a crafted (1) bbversion, (2) prev_hash, (3) nbit, or (4) ntime parameter in a mining.notify action stratum message.

The remote management interface of cgminer 4.10.0 and bfgminer 5.5.0 allows an authenticated remote attacker to execute arbitrary code due to a stack-based buffer overflow in the addpool, failover-only, poolquota, and save command handlers.

The remote management interface of cgminer 4.10.0 and bfgminer 5.5.0 allows an authenticated remote attacker to write the miner configuration file to arbitrary locations on the server due to missing basedir restrictions (absolute directory traversal).