CVE-2019-13456
First published: Tue Aug 06 2019(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| FreeRADIUS | >=3.0.0<=3.0.19 | |
| Linux Kernel | ||
| Red Hat Enterprise Linux | =7.0 | |
| Red Hat Enterprise Linux | =8.0 | |
| SUSE Linux | =15.1 |
Remedy
https://github.com/FreeRADIUS/freeradius-server/commit/3ea2a5a026e73d81cd9a3e9bbd4300c433004bfa
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00039.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1737663
- https://freeradius.org/security/
- https://github.com/FreeRADIUS/freeradius-server/commit/3ea2a5a026e73d81cd9a3e9bbd4300c433004bfa
- https://wpa3.mathyvanhoef.com
- https://wpa3.mathyvanhoef.com/#new
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1737664
- https://access.redhat.com/errata/RHSA-2020:1672
- https://access.redhat.com/security/cve/cve-2019-13456
- https://access.redhat.com/errata/RHSA-2020:3984
Frequently Asked Questions
What is the severity of CVE-2019-13456?
CVE-2019-13456 has a medium severity rating due to the potential for information leakage that can lead to password recovery.
How do I fix CVE-2019-13456?
To fix CVE-2019-13456, upgrade FreeRADIUS to version 3.0.20 or later, where the vulnerability is addressed.
Which versions of FreeRADIUS are affected by CVE-2019-13456?
CVE-2019-13456 affects FreeRADIUS versions 3.0.0 through 3.0.19.
What types of attacks are possible due to CVE-2019-13456?
CVE-2019-13456 could allow an attacker to recover user passwords through careful monitoring of failed EAP-pwd handshakes.
Is CVE-2019-13456 present in any specific Linux distributions?
CVE-2019-13456 is present in FreeRADIUS installations across various Linux distributions that use affected versions.
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