CVE-2019-20479

Public on 2020-10-22
Modified on 2020-11-16
Description
An open redirect flaw was discovered in mod_auth_openidc where it handles logout redirection. The module does not correctly validate the URL, allowing a URL with slash and backslash at the beginning to bypass the protection checks. A victim user may be tricked into visiting a trusted vulnerable web site, which would redirect him to another, possibly malicious, URL.
Severity
Medium
CVSS v3 Base Score
6.1
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 mod_auth_openidc 2020-10-22 18:29 ALAS2-2020-1538
Amazon Linux 1 mod24_auth_openidc 2020-11-14 01:23 ALAS-2020-1448

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD CVSSv2 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N
NVD CVSSv3 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N