CVE-2018-1000620: Eran Hammer cryptiles version 4.1.1 earlier contains a CWE-331: Insufficient Entropy vulnerability in randomDi

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CRITICAL 9.8REMOTEUPGRADE

CVE-2018-1000620 is a critical-severity flaw (CVSS 9.8) affecting cryptiles. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Eran Hammer cryptiles version 4.1.1 earlier contains a CWE-331: Insufficient Entropy vulnerability in randomDigits() method that can result in An attacker is more likely to be able to brute force something that was supposed to be random.. This attack appear to be exploitable via Depends upon the calling application.. This vulnerability appears to have been fixed in 4.1.2.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

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	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-331
Published	2018-07-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cryptiles project

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

Am I affected?

Timeline

2018-07-09 20:29 UTCPublished CVE record published
2026-06-17 01:32 UTCUpdated Record last modified

cryptiles project cryptiles UPGRADE

Affected: < 3.1.3 · >= 4.1.0 and < 4.1.2

Fixed in: 3.1.3, 4.1.2

Safe to downgrade to: a release before 4.1.0

1. Check installed version

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

2. UPGRADE to 3.1.3 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cryptiles

Note

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

3. If no update is available yet, DOWNGRADE to a release before 4.1.0 (Debian / Ubuntu)

apt-cache madison cryptiles sudo apt install cryptiles=<VERSION_BEFORE_4.1.0> sudo apt-mark hold cryptiles

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list cryptiles sudo dnf downgrade cryptiles-<VERSION_BEFORE_4.1.0> sudo dnf versionlock add cryptiles

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.

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-2018-1000620?

cryptiles: upgrade to 3.1.3, 4.1.2. Exact commands for each OS are on this page.

Is CVE-2018-1000620 being exploited?

CVE-2018-1000620 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-2018-1000620 affect?

CVE-2018-1000620 affects cryptiles. Severity is critical (CVSS 9.8). Eran Hammer cryptiles version 4.1.1 earlier contains a CWE-331: Insufficient Entropy vulnerability in randomDigits() method that can result in An attacker is more likely to be able to brute force something that was supposed to be random.. T

How urgent is CVE-2018-1000620?

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

References

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