{"id":"DEBIAN-CVE-2026-125406","details":"Ettercap through 0.8.4.1 contains a stack buffer underwrite vulnerability in the telnet dissector in src/dissectors/ec_telnet.c that decrements the output pointer on backspace without a lower bound check. Attackers can send a telnet stream with more backspaces than preceding characters to write below the stack buffer, corrupting the stack of the Ettercap process that normally runs as root.","modified":"2026-11-10T10:00:26.461499266Z","published":"2026-11-10T00:17:15.507Z","upstream":["CVE-2026-125406"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-125406"}],"affected":[{"package":{"name":"ettercap","ecosystem":"Debian:12","purl":"pkg:deb/debian/ettercap?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:0.8.3.1-11","1:0.8.3.1-12","1:0.8.3.1-13","1:0.8.3.1-14","1:0.8.3.1-15","1:0.8.3.1-16","1:0.8.4-1","1:0.8.4-2","1:0.8.4-3","1:0.8.4-4","1:0.8.4-5","1:0.8.4.1-1","1:0.8.4.1-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-125406.json"}},{"package":{"name":"ettercap","ecosystem":"Debian:13","purl":"pkg:deb/debian/ettercap?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:0.8.3.1-14","1:0.8.3.1-15","1:0.8.3.1-16","1:0.8.4-1","1:0.8.4-2","1:0.8.4-3","1:0.8.4-4","1:0.8.4-5","1:0.8.4.1-1","1:0.8.4.1-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-125406.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}