CVE-2021-31800
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-31800
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-31800.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-31800
- Aliases
- Downstream
- Related
- Published
- 2021-05-05T11:15:07Z
- Modified
- 2025-08-26T06:32:12.140818Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- 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.
- References
-
- https://github.com/SecureAuthCorp/impacket/blob/cb6d43a677c338db930bc4e9161620832c1ec624/impacket/smbserver.py#L2008
- https://github.com/SecureAuthCorp/impacket/blob/cb6d43a677c338db930bc4e9161620832c1ec624/impacket/smbserver.py#L2958
- https://github.com/SecureAuthCorp/impacket/blob/cb6d43a677c338db930bc4e9161620832c1ec624/impacket/smbserver.py#L3485
- https://github.com/SecureAuthCorp/impacket/blob/cb6d43a677c338db930bc4e9161620832c1ec624/impacket/smbserver.py#L876
- https://github.com/SecureAuthCorp/impacket/commit/49c643bf66620646884ed141c94e5fdd85bcdd2f
- https://github.com/SecureAuthCorp/impacket/releases
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IPXDPWCAPVX3UWYZ3N2T5OLBSBBUHJP6/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KRV2C5DATXBHG6TF6CEEX54KZ75THQS3/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UF56LYB27LHEIFJTFHU3M75NMNNK2SCG/
- https://security-tracker.debian.org/tracker/CVE-2021-31800
Affected packages
Debian:11 / impacket
Package
- Name
- impacket
- Purl
- pkg:deb/debian/impacket?arch=source
Debian:12 / impacket
Package
- Name
- impacket
- Purl
- pkg:deb/debian/impacket?arch=source
Debian:13 / impacket
Package
- Name
- impacket
- Purl
- pkg:deb/debian/impacket?arch=source
Debian:14 / impacket
Package
- Name
- impacket
- Purl
- pkg:deb/debian/impacket?arch=source
Git / github.com/fortra/impacket
Affected ranges
- Type
- GIT
- Repo
- https://github.com/fortra/impacket
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Type
- GIT
- Repo
- https://github.com/secureauthcorp/impacket
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedLast affected