UBUNTU-CVE-2021-32786

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Source
https://ubuntu.com/security/CVE-2021-32786
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32786.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-32786
Related
Published
2021-07-22T22:15:00Z
Modified
2024-10-15T14:08:10Z
Severity
  • 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
Summary
[none]
Details

modauthopenidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In versions prior to 2.4.9, oidc_validate_redirect_url() does not parse URLs the same way as most browsers do. As a result, this function can be bypassed and leads to an Open Redirect vulnerability in the logout functionality. This bug has been fixed in version 2.4.9 by replacing any backslash of the URL to redirect with slashes to address a particular breaking change between the different specifications (RFC2396 / RFC3986 and WHATWG). As a workaround, this vulnerability can be mitigated by configuring mod_auth_openidc to only allow redirection whose destination matches a given regular expression.

References

Affected packages

Ubuntu:Pro:16.04:LTS / libapache2-mod-auth-openidc

Package

Name
libapache2-mod-auth-openidc
Purl
pkg:deb/ubuntu/libapache2-mod-auth-openidc?arch=src?distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.6.0-1
1.8.5-1

Ecosystem specific 

{
    "ubuntu_priority": "medium"
}

Ubuntu:22.04:LTS / libapache2-mod-auth-openidc

Package

Name
libapache2-mod-auth-openidc
Purl
pkg:deb/ubuntu/libapache2-mod-auth-openidc?arch=src?distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.4.9-1

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "2.4.9-1",
            "binary_name": "libapache2-mod-auth-openidc"
        },
        {
            "binary_version": "2.4.9-1",
            "binary_name": "libapache2-mod-auth-openidc-dbgsym"
        }
    ]
}