CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
81.2%
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 userโthe 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.
Author | Note |
---|---|
mdeslaur | upstream sudo has disputed this CVE, sudo works as intended and as documented, so marking this as not-affected. |
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
81.2%