CVE-2021-32642: radsecproxy is a generic RADIUS proxy that supports both UDP and TLS (RadSec) RADIUS transports

Q: How do I fix CVE-2021-32642?

radsecproxy: upgrade to 1.9.0; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2021-32642 being exploited?

CVE-2021-32642 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-32642 affect?

CVE-2021-32642 affects radsecproxy, fedora. Severity is high (CVSS 7.0). radsecproxy is a generic RADIUS proxy that supports both UDP and TLS (RadSec) RADIUS transports. Missing input validation in radsecproxy's `naptr-eduroam.sh` and `radsec-dynsrv.sh` scripts can lead to configuration injection via crafted rad

Q: How urgent is CVE-2021-32642?

Priority 47/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.0REMOTEUPGRADEMITIGATE

CVE-2021-32642 is a high-severity flaw (CVSS 7.0) affecting radsecproxy, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

radsecproxy is a generic RADIUS proxy that supports both UDP and TLS (RadSec) RADIUS transports. Missing input validation in radsecproxy's `naptr-eduroam.sh` and `radsec-dynsrv.sh` scripts can lead to configuration injection via crafted radsec peer discovery DNS records. Users are subject to Information disclosure, Denial of Service, Redirection of Radius connection to a non-authenticated server leading to non-authenticated network access. Update

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.0 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Weakness	CWE-20, CWE-74
Published	2021-05-28
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: fedoraproject · uninett

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-05-28 17:15 UTCPublished CVE record published
2026-06-17 03:53 UTCUpdated Record last modified

uninett radsecproxy UPGRADE

Affected: < 1.9.0

Fixed in: 1.9.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy radsecproxy || rpm -q radsecproxy || radsecproxy --version

2. UPGRADE to 1.9.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade radsecproxy

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade radsecproxy

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

fedoraproject fedora MITIGATE

Affected: 33 · 34

Fixed in: no fixed release known

Safe to downgrade to: a release before 33

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-32642?

radsecproxy: upgrade to 1.9.0; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-32642 being exploited?

CVE-2021-32642 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-32642 affect?

CVE-2021-32642 affects radsecproxy, fedora. Severity is high (CVSS 7.0). radsecproxy is a generic RADIUS proxy that supports both UDP and TLS (RadSec) RADIUS transports. Missing input validation in radsecproxy's `naptr-eduroam.sh` and `radsec-dynsrv.sh` scripts can lead to configuration injection via crafted rad

How urgent is CVE-2021-32642?

Priority 47/100. High severity; Remotely exploitable, no login, no user action

References

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