Improper Authentication in FreeRADIUS - CVE-2019-11234

Vulnerability identifier: #VU18335

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-11234

CWE-ID: CWE-287

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error related to processing authentication tokens. A remote attacker can execute a reflection attack and bypass authentication process.

This vulnerability was dubbed "Dragonblood".

FreeRADIUS
freeradius (Alpine package)
freeradius (Ubuntu package)
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power
Opensuse
Dell PowerProtect Cyber Recovery

Install updates from vendor's website.

FreeRADIUS - update to 3.0.19
freeradius (Alpine package) - update to 3.0.13-r3
freeradius (Ubuntu package) - addressed in versions 3.0.16+dfsg-3ubuntu1.1, 3.0.16+dfsg-1ubuntu3.1, 3.0.17+dfsg-1ubuntu2.1
Dell PowerProtect Cyber Recovery - update to 18.1.1.2-8

• https://bugzilla.redhat.com/show_bug.cgi?id=1695783
• https://freeradius.org/release_notes/?br=3.0.x&re=3.0.19
• https://freeradius.org/security/
• https://papers.mathyvanhoef.com/dragonblood.pdf
• https://usn.ubuntu.com/3954-1/
• https://www.kb.cert.org/vuls/id/871675/

• Authentication bypass in FreeRADIUS
• Ubuntu update for FreeRADIUS
• OpenSUSE Linux update for freeradius-server
• OpenSUSE Linux update for freeradius-server
• Red Hat update for freeradius
• Red Hat update for freeradius:3.0
• OpenSUSE Linux update for freeradius-server
• Improper Authentication in freeradius (Alpine package)
• Multiple vulnerabilities in Dell EMC Cyber Recovery