HOMEVULNERABILITIESCVE-2019-13456
MEDIUM

CVE-2019-13456

CWE-203Published: December 3, 2019· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2019-13456 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

freeradius1 product(s)
freeradius
Linux1 product(s)
linux kernel
openSUSE1 product(s)
leap
Red Hat1 product(s)
enterprise linux
Source: NVD CPE · 5 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://bugzilla.redhat.com/show_bug.cgi?id=1737663
PATCHhttps://github.com/FreeRADIUS/freeradius-server/commit/3ea2a5a026e73d81cd9a3e9bbd4300c433004bfa
PATCHhttps://bugzilla.redhat.com/show_bug.cgi?id=1737663
PATCHhttps://github.com/FreeRADIUS/freeradius-server/commit/3ea2a5a026e73d81cd9a3e9bbd4300c433004bfa
ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-04/msg00039.html
ADVISORYhttps://freeradius.org/security/
ADVISORYhttps://wpa3.mathyvanhoef.com
ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-04/msg00039.html
ADVISORYhttps://freeradius.org/security/
ADVISORYhttps://wpa3.mathyvanhoef.com

All References (10)

→
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00039.htmlMailing List · Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1737663Exploit · Issue Tracking · Patch · Third Party Advisory
→
https://freeradius.org/security/Vendor Advisory
→
https://github.com/FreeRADIUS/freeradius-server/commit/3ea2a5a026e73d81cd9a3e9bbd4300c433004bfaPatch · Third Party Advisory
→
https://wpa3.mathyvanhoef.comExploit · Third Party Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00039.htmlMailing List · Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1737663Exploit · Issue Tracking · Patch · Third Party Advisory
→
https://freeradius.org/security/Vendor Advisory
→
https://github.com/FreeRADIUS/freeradius-server/commit/3ea2a5a026e73d81cd9a3e9bbd4300c433004bfaPatch · Third Party Advisory
→
https://wpa3.mathyvanhoef.comExploit · Third Party Advisory

Quick Facts

CVE IDCVE-2019-13456
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-203
CISA KEVNo
Affected4 vendor(s)
PublishedDec 3, 2019

Related CVEs (CWE-203)

CVE-2024-25189
9.8
CVE-2024-25190
9.8
CVE-2024-23771
9.8
CVE-2023-40756
9.8
CVE-2023-50708
9.8
CVE-2024-25191
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-13456 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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