Oracle Linux 8 : mod_auth_openidc:2.3 (ELSA-2022-1823)
medium Nessus Plugin ID 161280
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Synopsis
The remote Oracle Linux host is missing one or more security updates.Description
The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2022-1823 advisory.- mod_auth_openidc 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.
(CVE-2021-32786)
- mod_auth_openidc 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 mod_auth_openidc before version 2.4.9, the AES GCM encryption in mod_auth_openidc uses a static IV and AAD. It is important to fix because this creates a static nonce and since aes-gcm is a stream cipher, this can lead to known cryptographic issues, since the same key is being reused. From 2.4.9 onwards this has been patched to use dynamic values through usage of cjose AES encryption routines. (CVE-2021-32791)
- mod_auth_openidc 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 mod_auth_openidc before version 2.4.9, there is an XSS vulnerability in when using `OIDCPreservePost On`.
(CVE-2021-32792)
- mod_auth_openidc 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 2.4.9.4, the 3rd-party init SSO functionality of mod_auth_openidc was reported to be vulnerable to an open redirect attack by supplying a crafted URL in the `target_link_uri` parameter. A patch in version 2.4.9.4 made it so that the `OIDCRedirectURLsAllowed` setting must be applied to the `target_link_uri` parameter. There are no known workarounds aside from upgrading to a patched version.
(CVE-2021-39191)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected cjose, cjose-devel and / or mod_auth_openidc packages.See Also
Plugin Details
Severity: Medium
ID: 161280
File Name: oraclelinux_ELSA-2022-1823.nasl
Version: 1.2
Type: local
Agent: unix
Published: 5/18/2022
Updated: 5/18/2022
Supported Sensors: Frictionless Assessment Agent, Nessus Agent
Risk Information
VPR
Risk Factor: Low
Score: 3.8
CVSS v2
Risk Factor: Medium
Base Score: 5.8
Temporal Score: 4.3
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N
Temporal Vector: E:U/RL:OF/RC:C
CVSS Score Source: CVE-2021-39191
CVSS v3
Risk Factor: Medium
Base Score: 6.1
Temporal Score: 5.3
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Temporal Vector: E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:oracle:linux:8, p-cpe:/a:oracle:linux:cjose, p-cpe:/a:oracle:linux:cjose-devel, p-cpe:/a:oracle:linux:mod_auth_openidc
Required KB Items: Host/OracleLinux, Host/RedHat/release, Host/RedHat/rpm-list, Host/local_checks_enabled
Exploit Ease: No known exploits are available
Patch Publication Date: 5/17/2022
Vulnerability Publication Date: 7/22/2021
Reference Information
CVE: CVE-2021-32786, CVE-2021-32791, CVE-2021-32792, CVE-2021-39191