CVE-2024-25714: In Rhonabwy through 1.1.13, HMAC signature verification uses a strcmp function that is vulnerable to side-chan

Q: How do I fix CVE-2024-25714?

rhonabwy: upgrade to newer than 1.1.3; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2024-25714 being exploited?

CVE-2024-25714 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-2024-25714 affect?

CVE-2024-25714 affects rhonabwy, debian linux. Severity is critical (CVSS 9.8). In Rhonabwy through 1.1.13, HMAC signature verification uses a strcmp function that is vulnerable to side-channel attacks, because it stops the comparison when the first difference is spotted in the two signatures. (The fix uses gnutls_memc

Q: How urgent is CVE-2024-25714?

Priority 59/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

This month

CRITICAL 9.8REMOTEWATCHLISTUPGRADEMITIGATE

CVE-2024-25714 is a critical-severity flaw (CVSS 9.8) affecting rhonabwy, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Rhonabwy through 1.1.13, HMAC signature verification uses a strcmp function that is vulnerable to side-channel attacks, because it stops the comparison when the first difference is spotted in the two signatures. (The fix uses gnutls_memcmp, which has constant-time execution.)

Why this priority

Critical severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-203, CWE-1255
Published	2024-02-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: debian · rhonabwy project

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

Am I affected?

Timeline

2024-02-11 03:15 UTCPublished CVE record published
2026-06-17 07:16 UTCUpdated Record last modified

rhonabwy project rhonabwy UPGRADE

Affected: <= 1.1.3

Fixed in: newer than 1.1.3

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.1.3 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rhonabwy

Note

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

debian debian linux MITIGATE

Affected: 11.0 · 12.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.0

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-2024-25714?

rhonabwy: upgrade to newer than 1.1.3; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-25714 being exploited?

CVE-2024-25714 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-2024-25714 affect?

CVE-2024-25714 affects rhonabwy, debian linux. Severity is critical (CVSS 9.8). In Rhonabwy through 1.1.13, HMAC signature verification uses a strcmp function that is vulnerable to side-channel attacks, because it stops the comparison when the first difference is spotted in the two signatures. (The fix uses gnutls_memc

How urgent is CVE-2024-25714?

Priority 59/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Debian vulnerabilities · GnuTLS vulnerabilities

References

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