Improper Authentication in freeradius (Alpine package)

1) Improper Authentication

EUVDB-ID: #VU33323

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-2701

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

The ocsp_check function in rlm_eap_tls.c in FreeRADIUS 2.1.11, when OCSP is enabled, does not properly parse replies from OCSP responders, which allows remote attackers to bypass authentication by using the EAP-TLS protocol with a revoked X.509 client certificate.

Mitigation

Install update from vendor's website.

Vulnerable software versions

freeradius (Alpine package): 2.1.10-r13 - 2.1.10-r18

CPE2.3

• cpe:2.3:o:alpine:freeradius_alpine_package:2.1.10-r13:*:*:*:*:alpine_linux:*:2.1
• cpe:2.3:o:alpine:freeradius_alpine_package:2.1.10-r18:*:*:*:*:alpine_linux:*:2.1

External links

https://git.alpinelinux.org/aports/commit/?id=46e5e411d2e8cff9d479a70704e0cbd5c217e6e0
https://git.alpinelinux.org/aports/commit/?id=56b1f024b44611df68e184aca2754861c43c27a0

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.