FreeRADIUS up to 3.0.18 Dragonblood improper authentication

Summaryinfo

A vulnerability marked as critical has been reported in FreeRADIUS up to 3.0.18. The impacted element is an unknown function. This manipulation causes improper authentication (Dragonblood). This vulnerability is handled as CVE-2019-11234. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in FreeRADIUS up to 3.0.18 (Network Authentication Software). Affected by this vulnerability is an unknown code. The manipulation with an unknown input leads to a improper authentication vulnerability (Dragonblood). The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

FreeRADIUS before 3.0.19 does not prevent use of reflection for authentication spoofing, aka a "Dragonblood" issue, a similar issue to CVE-2019-9497.

The bug was discovered 04/15/2019. The weakness was released 04/22/2019 as Bug 1695783 as confirmed bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2019-11234 since 04/15/2019. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 7 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197437 (Ubuntu Security Notification for Freeradius Vulnerabilities (USN-3954-1)).

Upgrading to version 3.0.19 eliminates this vulnerability.

Entry connected to this vulnerability is available at VDB-133922. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Network Authentication Software

Name

• FreeRADIUS

Version

• 3.0.0
• 3.0.1
• 3.0.2
• 3.0.3
• 3.0.4
• 3.0.5
• 3.0.6
• 3.0.7
• 3.0.8
• 3.0.9
• 3.0.10
• 3.0.11
• 3.0.12
• 3.0.13
• 3.0.14
• 3.0.15
• 3.0.16
• 3.0.17
• 3.0.18

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion