Arch Linux Security Advisory ASA-201508-6
========================================
Severity: Low
Date    : 2015-08-14
CVE-ID  : CVE-2015-4680
Package : freeradius
Type    : insufficient CRL validation
Remote  : Yes
Link    : https://wiki.archlinux.org/title/CVE

Summary
======
The package freeradius before version 3.0.9-1 is vulnerable to
insufficient CRL validation.

Resolution
=========
Upgrade to 3.0.9-1.

# pacman -Syu "freeradius>=3.0.9-1"

The problem has been fixed upstream in version 3.0.9 and 2.2.8.

Workaround
=========
The FreeRADIUS project advises to use self-signed CAs without
intermediate CAs for EAP-TLS, as only intermediate CAs are apparently
vulnerable to this issue.

Description
==========
The FreeRADIUS server relies on OpenSSL to perform certificate
validation, including Certificate Revocation List (CRL) checks. The
FreeRADIUS usage of OpenSSL, in CRL application, limits the checks to
leaf certificates, therefore not detecting revocation of intermediate CA
certificates.
An unexpired client certificate, issued by an intermediate CA with a
revoked certificate, is therefore accepted by FreeRADIUS.

Impact
=====
A remote attacker might be able to authenticate using a certificate
signed by a revoked intermediate CA.

References
=========
https://freeradius.org/security/
http://ocert.org/advisories/ocert-2015-008.html
https://access.redhat.com/security/cve/CVE-2015-4680

ArchLinux: 201508-6: freeradius: insufficient CRL validation

August 14, 2015

Summary

The FreeRADIUS server relies on OpenSSL to perform certificate validation, including Certificate Revocation List (CRL) checks. The FreeRADIUS usage of OpenSSL, in CRL application, limits the checks to leaf certificates, therefore not detecting revocation of intermediate CA certificates. An unexpired client certificate, issued by an intermediate CA with a revoked certificate, is therefore accepted by FreeRADIUS.

Resolution

Upgrade to 3.0.9-1. # pacman -Syu "freeradius>=3.0.9-1"
The problem has been fixed upstream in version 3.0.9 and 2.2.8.

References

https://freeradius.org/security/ http://ocert.org/advisories/ocert-2015-008.html https://access.redhat.com/security/cve/CVE-2015-4680

Severity
Package : freeradius
Type : insufficient CRL validation
Remote : Yes
Link : https://wiki.archlinux.org/title/CVE

Workaround

The FreeRADIUS project advises to use self-signed CAs without intermediate CAs for EAP-TLS, as only intermediate CAs are apparently vulnerable to this issue.

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