CVE-2023-29479: Ribose RNP before 0.16.3 may hang when the input is malformed.

Q: How do I fix CVE-2023-29479?

rnp: upgrade to 0.16.3. Exact commands for each OS are on this page.

Q: Is CVE-2023-29479 being exploited?

CVE-2023-29479 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-2023-29479 affect?

CVE-2023-29479 affects rnp. Severity is medium (CVSS 5.3). Ribose RNP before 0.16.3 may hang when the input is malformed.

Q: How urgent is CVE-2023-29479?

Priority 38/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2023-29479 is a medium-severity flaw (CVSS 5.3) affecting rnp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Ribose RNP before 0.16.3 may hang when the input is malformed.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-400, CWE-770
Published	2023-04-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ribose

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

Am I affected?

Timeline

2023-04-24 15:15 UTCPublished CVE record published
2026-06-17 05:50 UTCUpdated Record last modified

ribose rnp UPGRADE

Affected: < 0.16.3

Fixed in: 0.16.3

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 0.16.3 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rnp

Note

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

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-2023-29479?

rnp: upgrade to 0.16.3. Exact commands for each OS are on this page.

Is CVE-2023-29479 being exploited?

CVE-2023-29479 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-2023-29479 affect?

CVE-2023-29479 affects rnp. Severity is medium (CVSS 5.3). Ribose RNP before 0.16.3 may hang when the input is malformed.

How urgent is CVE-2023-29479?

Priority 38/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-29480 HIGH 7.5 UPGRADE Ribose RNP before 0.16.3 sometimes lets secret keys remain unlocked after use.
CVE-2021-33589 HIGH 7.5 UPGRADE Ribose RNP before 0.15.1 does not implement a required step in a cryptographic algorithm, resulting in weaker

References

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