CVE-2019-13456: freeradius Observable Discrepancy
Vulnerability summary
CVE-2019-13456 is a medium (CVSS 6.5) Observable Discrepancy vulnerability in freeradius. EPSS estimates a 1.80% chance of exploitation in the next 30 days, higher than 78.2% of scored vulnerabilities. 2 public exploits are recorded.
Advisory lineage
Upstream 0 · Downstream 8 · Duplicates 1 · Related 6Timeline
- 03-12-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 4 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
1.80%
Chance of exploitation in the next 30 days
Percentile
78%
Versus all other CVEs
30-day change
0.00 pp
From 1.80% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
2 foundExploit Reference (wpa3.mathyvanhoef.com)
Maturity: unknown
Exploit Reference (bugzilla.redhat.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Redhat24 products
- enterprise_linuxEOL7.0 | 8.0
- freeradius< 0:3.0.17-7.module+el8.2.0+4847+336970e8
- freeradius-debuginfo< 0:3.0.17-7.module+el8.2.0+4847+336970e8
- freeradius-debugsource< 0:3.0.17-7.module+el8.2.0+4847+336970e8
- freeradius-devel< 0:3.0.17-7.module+el8.2.0+4847+336970e8
Debian1 product
- freeradius< 3.0.20+dfsg-1
Freeradius1 product
- freeradius≥ 3.0.0, ≤ 3.0.19
Opensuse1 product
- leapEOL15.1
Ubuntu1 product
- freeradius< 3.0.16+dfsg-1ubuntu3.1
5 vendors · 28 products
References
17 links- bugzilla.redhat.com/show_bug.cgi?id=1737663X Refsource MISCExploitIssue TrackingPatchThird Party AdvisoryREPORT
- github.com/FreeRADIUS/freeradius-server/commit/3ea2a5a026e73d81cd9a3e9bbd4300c433004bfaX Refsource CONFIRMPatchThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-04/msg00039.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
Show all 17 references
- wpa3.mathyvanhoef.comREPORT
