Upstream information
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.SUSE information
Overall state of this security issue: Does not affect SUSE products
This issue is currently rated as having important severity.
| National Vulnerability Database | |
|---|---|
| Base Score | 5 |
| Vector | AV:N/AC:L/Au:N/C:N/I:P/A:N |
| Access Vector | Network |
| Access Complexity | Low |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | Partial |
| Availability Impact | None |
| National Vulnerability Database | SUSE | |
|---|---|---|
| Base Score | 7.5 | 7.8 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Access Vector | Network | Local |
| Access Complexity | Low | Low |
| Privileges Required | None | Low |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | None | High |
| Integrity Impact | High | High |
| Availability Impact | None | High |
| CVSSv3 Version | 3.1 | 3.1 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.
| Product(s) | Source package | State |
|---|---|---|
| SUSE CaaS Platform 3.0 | sudo | Affected |
| SUSE Container as a Service Platform 1.0 | sudo | Affected |
| SUSE Container as a Service Platform 2.0 | sudo | Not affected |
| SUSE Linux Enterprise Desktop 12 SP4 | sudo | Not affected |
| SUSE Linux Enterprise High Performance Computing 12 SP4 | sudo | Affected |
| SUSE Linux Enterprise High Performance Computing 12 SP5 | sudo | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 | sudo | Not affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | sudo | Affected |
| SUSE Linux Enterprise Server 11 SP4 LTSS | sudo | Not affected |
| SUSE Linux Enterprise Server 12 SP1 LTSS | sudo | Not affected |
| SUSE Linux Enterprise Server 12 SP2 | sudo | Not affected |
| SUSE Linux Enterprise Server 12 SP2 LTSS | sudo | Not affected |
| SUSE Linux Enterprise Server 12 SP3 LTSS | sudo | Not affected |
| SUSE Linux Enterprise Server 12 SP4 | sudo | Affected |
| SUSE Linux Enterprise Server 12 SP5 | sudo | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | sudo | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | sudo | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | sudo | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | sudo | Affected |
| SUSE Linux Enterprise Software Development Kit 12 SP4 | sudo | Affected |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | sudo | Affected |
