{"id":"ALPINE-CVE-2021-31800","details":"Multiple path traversal vulnerabilities exist in smbserver.py in Impacket through 0.9.22. An attacker that connects to a running smbserver instance can list and write to arbitrary files via ../ directory traversal. This could potentially be abused to achieve arbitrary code execution by replacing /etc/shadow or an SSH authorized key.","modified":"2026-11-03T06:32:40.345367367Z","published":"2021-05-05T11:15:07.397Z","upstream":["CVE-2021-31800"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2021-31800"}],"affected":[{"package":{"name":"py3-impacket","ecosystem":"Alpine:v3.14","purl":"pkg:apk/alpine/py3-impacket?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-31800.json"}},{"package":{"name":"py3-impacket","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/py3-impacket?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-31800.json"}},{"package":{"name":"py3-impacket","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/py3-impacket?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-31800.json"}},{"package":{"name":"py3-impacket","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/py3-impacket?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-31800.json"}},{"package":{"name":"py3-impacket","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/py3-impacket?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-31800.json"}},{"package":{"name":"py3-impacket","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/py3-impacket?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-31800.json"}},{"package":{"name":"py3-impacket","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/py3-impacket?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-31800.json"}},{"package":{"name":"py3-impacket","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/py3-impacket?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-31800.json"}},{"package":{"name":"py3-impacket","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/py3-impacket?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-31800.json"}},{"package":{"name":"py3-impacket","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/py3-impacket?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-31800.json"}},{"package":{"name":"py3-impacket","ecosystem":"Alpine:v3.24","purl":"pkg:apk/alpine/py3-impacket?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.23-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-31800.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"}]}