{"id":"DEBIAN-CVE-2026-18536","details":"Data::Entropy versions before 0.010 for Perl read remote entropy sources over plain HTTP.  The Data::Entropy::RawSource::RandomOrg and Data::Entropy::RawSource::RandomnumbersInfo remote sources are accessed over plain HTTP.  The Data::Entropy::RawSource::RandomOrg integrity check trivially matches any non-empty byte string.  Any on-path attacker, such as open WiFi, a compromised ISP, captive portal, or a hostile egress proxy substitutes the response and thereby chooses the bytes returned by rand_bits and rand_int for every application that selected one of these sources via with_entropy_source. The _checkbuf method response is equally attacker-controlled, so the retry/sleep behaviour is steerable too.","modified":"2026-09-14T17:03:20.487993458Z","published":"2026-08-01T11:16:38.483Z","upstream":["CVE-2026-18536"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-18536"}],"affected":[{"package":{"name":"libdata-entropy-perl","ecosystem":"Debian:12","purl":"pkg:deb/debian/libdata-entropy-perl?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.007-4","0.007-4+deb12u1","0.008-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18536.json"}},{"package":{"name":"libdata-entropy-perl","ecosystem":"Debian:13","purl":"pkg:deb/debian/libdata-entropy-perl?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.008-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18536.json"}},{"package":{"name":"libdata-entropy-perl","ecosystem":"Debian:14","purl":"pkg:deb/debian/libdata-entropy-perl?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.008-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18536.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}