{"id":"ALPINE-CVE-2021-44143","details":"A flaw was found in mbsync in isync 1.4.0 through 1.4.3. Due to an unchecked condition, a malicious or compromised IMAP server could use a crafted mail message that lacks headers (i.e., one that starts with an empty line) to provoke a heap overflow, which could conceivably be exploited for remote code execution.","modified":"2026-11-03T06:32:47.924757075Z","published":"2021-11-22T20:15:18.223Z","upstream":["CVE-2021-44143"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2021-44143"}],"affected":[{"package":{"name":"isync","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/isync?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.4.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-44143.json"}},{"package":{"name":"isync","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/isync?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.4.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-44143.json"}},{"package":{"name":"isync","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/isync?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.4.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-44143.json"}},{"package":{"name":"isync","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/isync?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.4.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-44143.json"}},{"package":{"name":"isync","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/isync?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.4.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-44143.json"}},{"package":{"name":"isync","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/isync?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.4.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-44143.json"}},{"package":{"name":"isync","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/isync?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.4.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-44143.json"}},{"package":{"name":"isync","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/isync?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.4.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-44143.json"}},{"package":{"name":"isync","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/isync?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.4.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-44143.json"}},{"package":{"name":"isync","ecosystem":"Alpine:v3.24","purl":"pkg:apk/alpine/isync?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.4.0"},{"fixed":"1.4.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-44143.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}