Vulnerability · Published Dec 17, 2020 · Assigned by redhat
CVE-2020-27780
Critical 9.8
In plain English
A critical-severity improper authentication in pam. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.0% (higher than 80% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)2.0%top 19.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | linux-pam | 1.5.1-r0 | ALPINE-CVE-2020-27780 |
| Alpine:v3.21 | linux-pam | 1.5.1-r0 | ALPINE-CVE-2020-27780 |
| Alpine:v3.22 | linux-pam | 1.5.1-r0 | ALPINE-CVE-2020-27780 |
| Alpine:v3.23 | linux-pam | 1.5.1-r0 | ALPINE-CVE-2020-27780 |
| Alpine:v3.24 | linux-pam | 1.5.1-r0 | ALPINE-CVE-2020-27780 |
Affected products (as reported)
Weakness: CWE-287
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1901094 x_refsource_MISC