Description
Stack-based buffer overflow in the normify function in the rlm_pap module (modules/rlm_pap/rlm_pap.c) in FreeRADIUS 2.x, possibly 2.2.3 and earlier, and 3.x, possibly 3.0.1 and earlier, might allow attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long password hash, as demonstrated by an SSHA hash.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | freeradius | 2.2.5+dfsg-0.1 | — |
| Debian 13 | freeradius | 2.2.5+dfsg-0.1 | — |
| Debian 12 | freeradius | 2.2.5+dfsg-0.1 | — |
| Debian 7 | freeradius | 2.1.12+dfsg-1.2+deb7u1 | DLA-977-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | freeradius +8 | 2.2.6-4.el6 | RHSA-2015:1287 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | freeradius-server | 3.0.12-1.1 | openSUSE-SU-2024:10053-1 |
Advisories 3
- RHSA-2015:1287 Red Hat Security Advisory: freeradius security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DLA-977-1 freeradius - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10053-1 freeradius-server-3.0.12-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- [freebsd-bugbusters] 20140214 freeradius denial of service in authentication flow mailing-list
- [oss-security] 20140216 Re: CVE request: freeradius denial of service in rlm_pap hash processing mailing-list
- RHSA-2015:1287 vendor-advisory
- [freebsd-bugbusters] 20140213 freeradius denial of service in authentication flow mailing-list
- USN-2122-1 vendor-advisory
- [freebsd-bugbusters] 20140212 freeradius denial of service in authentication flow mailing-list
- 65581 vdb-entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1066761