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9.8
CVSSv3

CVE-2020-27780

Published: 18/12/2020 Updated: 28/12/2020
CVSS v2 Base Score: 10 | Impact Score: 10 | Exploitability Score: 10
CVSS v3 Base Score: 9.8 | Impact Score: 5.9 | Exploitability Score: 3.9
VMScore: 890
Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
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Vulnerability Summary

A flaw was found in Linux-Pam in versions before 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.

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Vendor Advisories

Arch Linux Issues:
An authentication bypass issue was found in pam 150 Nonexistent users could authenticate if the root password was empty ...

Mailing Lists

Full Disclosure: Heads up: PAM 1.5.0 has a auth bypass under some conditions
<!--X-Body-Begin--> <!--X-User-Header--> oss-sec mailing list archives <!--X-User-Header-End--> <!--X-TopPNI--> By Date By Thread </form> <!--X-TopPNI-End--> <!--X-MsgBody--> <!--X-Subject-Header-Begin--> Heads up: PAM 150 has a auth bypass under some conditions <!--X-Subject-Header-End--> <!--X-Head-of-Message--> From: Marcu ...

References

CWE-287https://bugzilla.redhat.com/show_bug.cgi?id=1901094https://nvd.nist.govhttps://security.archlinux.org/CVE-2020-27780http://seclists.org/oss-sec/2020/q4/159
CVSSv3
CVSSv2
CVSSv3
VMScore
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