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National Vulnerability Database

National Vulnerability Database

NVD

  1. Vulnerabilities

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

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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  

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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