CVE-2020-27780

NameCVE-2020-27780
DescriptionA 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severityhigh

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
pam (PTS)stretch1.1.8-3.6fixed
buster1.3.1-5fixed
bullseye1.4.0-9+deb11u1fixed
bookworm, sid1.4.0-10fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
pamsource(unstable)(not affected)

Notes

- pam <not-affected> (Only affects 1.5.0)
https://github.com/linux-pam/linux-pam/issues/284
Introduced by: https://github.com/linux-pam/linux-pam/commit/af0faf666c5008e54dfe43684f210e3581ff1bca (v1.5.0)
Fixed by: https://github.com/linux-pam/linux-pam/commit/30fdfb90d9864bcc254a62760aaa149d373fd4eb

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