{"id":"DEBIAN-CVE-2004-1440","details":"Multiple heap-based buffer overflows in the modpow function in PuTTY before 0.55 allow (1) remote attackers to execute arbitrary code via an SSH2 packet with a base argument that is larger than the mod argument, which causes the modpow function to write memory before the beginning of its buffer, and (2) remote malicious servers to cause a denial of service (client crash) and possibly execute arbitrary code via a large bignum during authentication.","modified":"2026-09-15T06:47:19.153636481Z","published":"2004-12-31T05:00:00Z","upstream":["CVE-2004-1440"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2004-1440"}],"affected":[{"package":{"name":"putty","ecosystem":"Debian:12","purl":"pkg:deb/debian/putty?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.56-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2004-1440.json"}},{"package":{"name":"putty","ecosystem":"Debian:13","purl":"pkg:deb/debian/putty?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.56-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2004-1440.json"}},{"package":{"name":"putty","ecosystem":"Debian:14","purl":"pkg:deb/debian/putty?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.56-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2004-1440.json"}}],"schema_version":"1.9.0"}