modules/rlm_unix/rlm_unix.c in FreeRADIUS before 2.2.0, when unix mode is enabled for user authentication, does not properly check the passw
modules/rlm_unix/rlm_unix.c in FreeRADIUS before 2.2.0, when unix mode is enabled for user authentication, does not properly check the password expiration in /etc/shadow, which allows remote authenticated users to authenticate using an expired password.
- Published
- Mar 12, 2013
- Updated
- Jun 16, 2026
- EPSS
- 1.4% · 71th percentile
- CWE
- CWE-255
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Report tools
Action score
24
Monitor
Low priority for now.
- CVSS
- 24 / 40 · 6.0 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.4%
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| freeradius | freeradius | cpe:2.3:a:freeradius:freeradius |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- freeradius freeradiusall versions
- freeradius freeradiusup to 2.2.0 inclusive
- freeradius freeradius0.1
- freeradius freeradius0.2
- freeradius freeradius0.3
- freeradius freeradius0.4
- freeradius freeradius0.5
- freeradius freeradius0.6
- freeradius freeradius0.7
- freeradius freeradius0.7.1
- freeradius freeradius0.8
- freeradius freeradius0.8.1
- freeradius freeradius0.9
- freeradius freeradius0.9.0
- freeradius freeradius0.9.1
- freeradius freeradius0.9.2
- freeradius freeradius0.9.3
- freeradius freeradius1.0.0
- freeradius freeradius1.0.1
- freeradius freeradius1.0.2
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | freeradius | before 2.1.12+dfsg-1.2 | 2.1.12+dfsg-1.2 |
| Red Hat:enterprise_linux:5::client_workstation | freeradius2 | before 0:2.1.12-5.el5 | 0:2.1.12-5.el5 |
| Red Hat:enterprise_linux:5::client_workstation | freeradius2-debuginfo | before 0:2.1.12-5.el5 | 0:2.1.12-5.el5 |
| Red Hat:enterprise_linux:5::client_workstation | freeradius2-krb5 | before 0:2.1.12-5.el5 | 0:2.1.12-5.el5 |
| Red Hat:enterprise_linux:5::client_workstation | freeradius2-ldap | before 0:2.1.12-5.el5 | 0:2.1.12-5.el5 |
| Red Hat:enterprise_linux:5::client_workstation | freeradius2-mysql | before 0:2.1.12-5.el5 | 0:2.1.12-5.el5 |
| Red Hat:enterprise_linux:5::client_workstation | freeradius2-perl | before 0:2.1.12-5.el5 | 0:2.1.12-5.el5 |
| Red Hat:enterprise_linux:5::client_workstation | freeradius2-postgresql | before 0:2.1.12-5.el5 | 0:2.1.12-5.el5 |
| Red Hat:enterprise_linux:5::client_workstation | freeradius2-python | before 0:2.1.12-5.el5 | 0:2.1.12-5.el5 |
| Red Hat:enterprise_linux:5::client_workstation | freeradius2-unixODBC | before 0:2.1.12-5.el5 | 0:2.1.12-5.el5 |
| Red Hat:enterprise_linux:5::client_workstation | freeradius2-utils | before 0:2.1.12-5.el5 | 0:2.1.12-5.el5 |
| Red Hat:enterprise_linux:6::server | freeradius | before 0:2.1.12-3.el6 | 0:2.1.12-3.el6 |
| Red Hat:enterprise_linux:6::server | freeradius-debuginfo | before 0:2.1.12-3.el6 | 0:2.1.12-3.el6 |
| Red Hat:enterprise_linux:6::server | freeradius-krb5 | before 0:2.1.12-3.el6 | 0:2.1.12-3.el6 |
| Red Hat:enterprise_linux:6::server | freeradius-ldap | before 0:2.1.12-3.el6 | 0:2.1.12-3.el6 |
| Red Hat:enterprise_linux:6::server | freeradius-mysql | before 0:2.1.12-3.el6 | 0:2.1.12-3.el6 |
| Red Hat:enterprise_linux:6::server | freeradius-perl | before 0:2.1.12-3.el6 | 0:2.1.12-3.el6 |
| Red Hat:enterprise_linux:6::server | freeradius-postgresql | before 0:2.1.12-3.el6 | 0:2.1.12-3.el6 |
| Red Hat:enterprise_linux:6::server | freeradius-python | before 0:2.1.12-3.el6 | 0:2.1.12-3.el6 |
| Red Hat:enterprise_linux:6::server | freeradius-unixODBC | before 0:2.1.12-3.el6 | 0:2.1.12-3.el6 |
| Red Hat:enterprise_linux:6::server | freeradius-utils | before 0:2.1.12-3.el6 | 0:2.1.12-3.el6 |
Same product
freeradius: all recordsOther highest-scoring records for the same primary product.
- CVE-2019-11234FreeRADIUS before 3.0.19 does not prevent use of reflection for authentication spoofing, aka a "Dragonblood" issue, a similar issue to CVE-241Plan
- CVE-2017-10984An FR-GV-301 issue in FreeRADIUS 3.x before 3.0.15 allows "Write overflow in data2vp_wimax()" - this allows remote attackers to cause a deni41Plan
- CVE-2017-10979An FR-GV-202 issue in FreeRADIUS 2.x before 2.2.10 allows "Write overflow in rad_coalesce()" - this allows remote attackers to cause a denia41Plan
- CVE-2003-0968Stack-based buffer overflow in SMB_Logon_Server of the rlm_smb experimental module for FreeRADIUS 0.9.3 and earlier allows remote attackers 41Plan
- CVE-2024-3596RADIUS Protocol under RFC2865 is vulnerable to forgery attacks.40Plan
- CVE-2019-11235FreeRADIUS before 3.0.19 mishandles the "each participant verifies that the received scalar is within a range, and that the received group e40Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:freeradius | 2.1.12+dfsg-1.2 · Debian:12 | Package registry (OSV) |
| red hat:freeradius | 0:2.1.12-3.el6 · Red Hat:enterprise_linux:6::server | Package registry (OSV) |
| red hat:freeradius-debuginfo | 0:2.1.12-3.el6 · Red Hat:enterprise_linux:6::server | Package registry (OSV) |
| red hat:freeradius-krb5 | 0:2.1.12-3.el6 · Red Hat:enterprise_linux:6::server | Package registry (OSV) |
| red hat:freeradius-ldap | 0:2.1.12-3.el6 · Red Hat:enterprise_linux:6::server | Package registry (OSV) |
| red hat:freeradius-mysql | 0:2.1.12-3.el6 · Red Hat:enterprise_linux:6::server | Package registry (OSV) |
| red hat:freeradius-perl | 0:2.1.12-3.el6 · Red Hat:enterprise_linux:6::server | Package registry (OSV) |
| red hat:freeradius-postgresql | 0:2.1.12-3.el6 · Red Hat:enterprise_linux:6::server | Package registry (OSV) |
| red hat:freeradius-python | 0:2.1.12-3.el6 · Red Hat:enterprise_linux:6::server | Package registry (OSV) |
| red hat:freeradius-unixODBC | 0:2.1.12-3.el6 · Red Hat:enterprise_linux:6::server | Package registry (OSV) |
| red hat:freeradius-utils | 0:2.1.12-3.el6 · Red Hat:enterprise_linux:6::server | Package registry (OSV) |
| red hat:freeradius2 | 0:2.1.12-5.el5 · Red Hat:enterprise_linux:5::client_workstation | Package registry (OSV) |
| red hat:freeradius2-debuginfo | 0:2.1.12-5.el5 · Red Hat:enterprise_linux:5::client_workstation | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
If successful
- Confidentiality
- P · data can be read
- Integrity
- P · data or configuration can be modified
- Availability
- P · the service can be disrupted
- Attack complexity
- M
- Confidentiality impact
- P
- Integrity impact
- P
- Availability impact
- P
Weakness class (CWE)
CWE-255 · Credentials Management ErrorsCVSS vector
AV:N/AC:M/Au:S/C:P/I:P/A:P
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- lists.opensuse.org/opensuse-updates/2013-01/msg00029.html
- lists.opensuse.org/opensuse-updates/2013-01/msg00079.html
- rhn.redhat.com/errata/RHBA-2012-0881.html
- rhn.redhat.com/errata/RHSA-2013-0134.html
- github.com/alandekok/freeradius-server/commit/1b1ec5ce75e224bd1755650c18ccdaa6dc53e605
Vendor advisories and official records. Exploit/PoC links are deliberately left out.