A stack-buffer overflow vulnerability exists in all versions of sngrep since v1.4.1. The flaw is due to inadequate bounds checking when copying 'Content-Length' and 'Warning' headers into fixed-size buffers in the sip_validate_packet and sip_parse_extra_headers functions within src/sip.c. This vulnerability allows remote attackers to execute arbitrary code or cause a denial of service (DoS) via crafted SIP messages.

A buffer overflow vulnerability exists in all versions of sngrep since v0.4.2, due to improper handling of 'Call-ID' and 'X-Call-ID' SIP headers. The functions sip_get_callid and sip_get_xcallid in sip.c use the strncpy function to copy header contents into fixed-size buffers without checking the data length. This flaw allows remote attackers to execute arbitrary code or cause a denial of service (DoS) through specially crafted SIP messages.

Sngrep v1.6.0 was discovered to contain a heap buffer overflow via the function capture_ws_check_packet at /src/capture.c.

Sngrep v1.6.0 was discovered to contain a heap buffer overflow via the function capture_packet_reasm_ip at /src/capture.c.

Sngrep v1.6.0 was discovered to contain a stack buffer overflow via the function packet_set_payload at /src/packet.c.