CVE-2020-27780
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2020-27780
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-27780.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2020-27780
- Downstream
- Related
- Published
- 2020-12-18T00:15:14Z
- Modified
- 2025-10-14T17:51:48.689955Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
Affected packages
Git / github.com/linux-pam/linux-pam
Database specific
{
"vanir_signatures": [
{
"signature_version": "v1",
"target": {
"file": "modules/pam_unix/bigcrypt.c"
},
"signature_type": "Line",
"source": "https://github.com/linux-pam/linux-pam/commit/225f17470eed9f44282f435ad1ed64c94d9a2ddf",
"deprecated": false,
"digest": {
"line_hashes": [
"236274917370666437465787812312716913764",
"191165804437170388625080527033927485485",
"248212176959400049713618959841331975794",
"74187730262540881415256141112760525222",
"53241490001132424225404146543772968193",
"169694962436386515826333909717745520461",
"339114646913897635961686157876483083914",
"200902990943821488650428420571812193360"
],
"threshold": 0.9
},
"id": "CVE-2020-27780-90a0a465"
},
{
"signature_version": "v1",
"target": {
"function": "bigcrypt",
"file": "modules/pam_unix/bigcrypt.c"
},
"signature_type": "Function",
"source": "https://github.com/linux-pam/linux-pam/commit/225f17470eed9f44282f435ad1ed64c94d9a2ddf",
"deprecated": false,
"digest": {
"length": 1660.0,
"function_hash": "251657082591479008743931529537448873642"
},
"id": "CVE-2020-27780-febf053a"
}
]
}