CVE-2013-1800: The crack gem 0.3.1 and earlier for Ruby does not properly restrict casts of string values, which might allow

Q: How do I fix CVE-2013-1800?

crack: upgrade to newer than 0.3.1. Exact commands for each OS are on this page.

Q: Is CVE-2013-1800 being exploited?

CVE-2013-1800 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-2013-1800 affect?

CVE-2013-1800 affects crack. Severity is high (CVSS 7.5). The crack gem 0.3.1 and earlier for Ruby does not properly restrict casts of string values, which might allow remote attackers to conduct object-injection attacks and execute arbitrary code, or cause a denial of service (memory and CPU cons

Q: How urgent is CVE-2013-1800?

Priority 54/100. High severity; EPSS top 8%: very likely to be exploited; Public exploit reference

This month

HIGH 7.5UPGRADE

CVE-2013-1800 is a high-severity flaw (CVSS 7.5) affecting crack. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The crack gem 0.3.1 and earlier for Ruby does not properly restrict casts of string values, which might allow remote attackers to conduct object-injection attacks and execute arbitrary code, or cause a denial of service (memory and CPU consumption) by leveraging Action Pack support for (1) YAML type conversion or (2) Symbol type conversion, a similar vulnerability to CVE-2013-0156.

Why this priority

High severity
EPSS top 8%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	5.0% (top 8%)
CISA exploited list	No
Weakness	CWE-264
Published	2013-04-09
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: john nunemaker

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

Am I affected?

Timeline

2013-04-09 20:55 UTCPublished CVE record published
2026-06-16 23:52 UTCUpdated Record last modified

john nunemaker crack UPGRADE

Affected: <= 0.3.1 · 0.1.8 · 0.2.0 · 0.3.0

Fixed in: newer than 0.3.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 0.3.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade crack

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-2013-1800?

crack: upgrade to newer than 0.3.1. Exact commands for each OS are on this page.

Is CVE-2013-1800 being exploited?

CVE-2013-1800 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-2013-1800 affect?

CVE-2013-1800 affects crack. Severity is high (CVSS 7.5). The crack gem 0.3.1 and earlier for Ruby does not properly restrict casts of string values, which might allow remote attackers to conduct object-injection attacks and execute arbitrary code, or cause a denial of service (memory and CPU cons

How urgent is CVE-2013-1800?

Priority 54/100. High severity; EPSS top 8%: very likely to be exploited; Public exploit reference

Software pages

Ruby vulnerabilities

References

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