Vulnerability Details : CVE-2020-27780
A flaw was found in Linux-Pam in versions prior to 1.5.1 in the way it handle empty passwords for non-existing users. When the user doesn't exist PAM try to authenticate with root and in the case of an empty password it successfully authenticate.
Vulnerability category: BypassGain privilege
Products affected by CVE-2020-27780
- cpe:2.3:a:linux-pam:linux-pam:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-27780
0.44%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 61 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-27780
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
10.0
|
HIGH | AV:N/AC:L/Au:N/C:C/I:C/A:C |
10.0
|
10.0
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2020-27780
-
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.Assigned by: secalert@redhat.com (Primary)
References for CVE-2020-27780
-
https://bugzilla.redhat.com/show_bug.cgi?id=1901094
1901094 – (CVE-2020-27780) CVE-2020-27780 pam: authentication bypass when the user doesn't exist and root password is blankIssue Tracking;Third Party Advisory
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