CVE-2019-13456

What it is

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.

At a glance

Exploitability

Can be exploited from the same network segment without logging in. High risk of data exposure.

Exploit odds

1.8% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2019-12-03 20:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 02:16 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.8% in the next 30 days (EPSS).
• Severity: 6.5 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2019-12-03 20:15 UTC

Last modified

2026-06-17 02:16 UTC

Exploit probability

1.8% · EPSS, next 30 days

Weakness

CWE-203

Record status

Modified

Affected

• Freeradius ≤ 3.0.19
• Redhat Enterprise Linux 7.0
• Redhat Enterprise Linux 8.0
• Opensuse Leap 15.1

Attack profile CVSS 3.1 · 6.5

Attack vector

Adjacent network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2019-13456.md and follow it. Check whether this project is affected by CVE-2019-13456. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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