Vulnerability Monitor

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CVE-2019-13456

In FreeRADIUS 3.0 through 3.0.19, on average 1 in every 2048 EAP-pwd handshakes fails because the password element cannot be found within 10 iterations of the hunting and pecking loop. This leaks information that an attacker can use to recover the password of any user. This information leakage is similar to the "Dragonblood" attack and CVE-2019-9494.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.5, indicating it requires adjacent network access with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), for affected systems. Impacting 4 products from freeradius, from linux, from redhat and 1 other, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2019-12-03T20:15:11.013

Last Modified

2024-11-21T04:24:56.510

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

CVSSv2 Vector

AV:A/AC:M/Au:N/C:P/I:N/A:N

Access Vector: ADJACENT_NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

5.5

Impact Score

2.9

Weaknesses

Type: Primary
CWE-203

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	freeradius	freeradius	≤ 3.0.19	Yes
Operating System	linux	linux_kernel	-	No
Operating System	redhat	enterprise_linux	7.0	Yes
Operating System	redhat	enterprise_linux	8.0	Yes
Operating System	opensuse	leap	15.1	Yes

References

http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00039.html Mailing List, Third Party Advisory ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=1737663 Exploit, Issue Tracking, Patch, Third Party Advisory ([email protected])
https://freeradius.org/security/ Vendor Advisory ([email protected])
https://github.com/FreeRADIUS/freeradius-server/commit/3ea2a5a026e73d81cd9a3e9bbd4300c433004bfa Patch, Third Party Advisory ([email protected])
https://wpa3.mathyvanhoef.com Exploit, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00039.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=1737663 Exploit, Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://freeradius.org/security/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/FreeRADIUS/freeradius-server/commit/3ea2a5a026e73d81cd9a3e9bbd4300c433004bfa Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://wpa3.mathyvanhoef.com Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For freeradius's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.