CVE-2013-4147: Multiple format string vulnerabilities in Yet Another Radius Daemon (YARD RADIUS) 1.1.2 allow context-dependen

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HIGH 7.5DOWNGRADE

CVE-2013-4147 is a high-severity flaw (CVSS 7.5) affecting yard radius. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple format string vulnerabilities in Yet Another Radius Daemon (YARD RADIUS) 1.1.2 allow context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via format string specifiers in a request in the (1) log_msg function in log.c or (2) version or (3) build_version function in version.c.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	3.7% (top 10%)
CISA exploited list	No
Weakness	CWE-134
Published	2013-08-09
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: yard radius project

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2013-08-09 21:55 UTCPublished CVE record published
2026-06-16 23:56 UTCUpdated Record last modified

yard radius project yard radius DOWNGRADE

Affected: 1.1.2-4

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.2-4

1. Check installed version

apt-cache policy yard-radius || rpm -q yard-radius || yard-radius --version

2. No fixed release: DOWNGRADE to a release before 1.1.2-4 (Debian / Ubuntu)

apt-cache madison yard-radius sudo apt install yard-radius=<VERSION_BEFORE_1.1.2-4> sudo apt-mark hold yard-radius

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list yard-radius sudo dnf downgrade yard-radius-<VERSION_BEFORE_1.1.2-4> sudo dnf versionlock add yard-radius

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: YardRadius - Multiple Local Format String Vulnerabilities

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-2013-4147?

yard radius: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2013-4147 being exploited?

CVE-2013-4147 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-2013-4147 affect?

CVE-2013-4147 affects yard radius. Severity is high (CVSS 7.5). Multiple format string vulnerabilities in Yet Another Radius Daemon (YARD RADIUS) 1.1.2 allow context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via format string specifiers in a request in t

How urgent is CVE-2013-4147?

Priority 54/100. High severity; Public exploit reference

References

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