DEBIAN-CVE-2019-19234
- Source
- https://security-tracker.debian.org/tracker/CVE-2019-19234
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2019-19234.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2019-19234
- Upstream
- Published
- 2019-12-19T21:15:13.823Z
- Modified
- 2025-11-19T01:01:59.082796Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
- Summary
- [none]
- Details
-
In Sudo through 1.8.29, the fact that a user has been blocked (e.g., by using the ! character in the shadow file instead of a password hash) is not considered, allowing an attacker (who has access to a Runas ALL sudoer account) to impersonate any blocked user. NOTE: The software maintainer believes that this CVE is not valid. Disabling local password authentication for a user is not the same as disabling all access to that user--the user may still be able to login via other means (ssh key, kerberos, etc). Both the Linux shadow(5) and passwd(1) manuals are clear on this. Indeed it is a valid use case to have local accounts that are only accessible via sudo and that cannot be logged into with a password. Sudo 1.8.30 added an optional setting to check the shell of the target user (not the encrypted password!) against the contents of /etc/shells but that is not the same thing as preventing access to users with an invalid password hash
- References
Affected packages
Debian:11 / sudo
Package
- Name
- sudo
- Purl
- pkg:deb/debian/sudo?arch=source
Debian:12 / sudo
Package
- Name
- sudo
- Purl
- pkg:deb/debian/sudo?arch=source
Debian:13 / sudo
Package
- Name
- sudo
- Purl
- pkg:deb/debian/sudo?arch=source
Debian:14 / sudo
Package
- Name
- sudo
- Purl
- pkg:deb/debian/sudo?arch=source