CVE-2019-19234 Detail

Current Description

** DISPUTED ** 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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  7.5 HIGH
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Hyperlink Resource
https://access.redhat.com/security/cve/cve-2019-19234
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I6TKF36KOQUVJNBHSVJFA7BU3CCEYD2F/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IY6DZ7WMDKU4ZDML6MJLDAPG42B5WVUC/
https://quickview.cloudapps.cisco.com/quickview/bug/CSCvs58104
https://quickview.cloudapps.cisco.com/quickview/bug/CSCvs58473
https://quickview.cloudapps.cisco.com/quickview/bug/CSCvs58772
https://quickview.cloudapps.cisco.com/quickview/bug/CSCvs58812
https://quickview.cloudapps.cisco.com/quickview/bug/CSCvs58979
https://quickview.cloudapps.cisco.com/quickview/bug/CSCvs60748
https://security.netapp.com/advisory/ntap-20200103-0004/
https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2019-19234
https://support2.windriver.com/index.php?page=defects&on=view&id=LIN1018-5505
https://support2.windriver.com/index.php?page=defects&on=view&id=LIN1019-3816
https://www.bsi.bund.de/SharedDocs/Warnmeldungen/DE/CB/2019/12/warnmeldung_cb-k20-0001.html
https://www.oracle.com/security-alerts/bulletinapr2020.html
https://www.sudo.ws/devel.html#1.8.30b2 Vendor Advisory 
https://www.sudo.ws/stable.html Vendor Advisory 
https://www.suse.com/security/cve/CVE-2019-19234/
https://www.tenable.com/plugins/nessus/132985

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

8 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-19234
NVD Published Date:
12/19/2019
NVD Last Modified:
01/30/2020
Source:
MITRE