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CVE-2013-4287· NVD / CVE Program· CNA redhat

Algorithmic complexity vulnerability in Gem::Version::VERSION_PATTERN in lib/rubygems/version.rb in RubyGems before 1.8.23.1, 1.8.24 through

Noroxi assessment

Priority: Monitor (action score 18/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 3.3% (FIRST EPSS); higher than 88.4% of all records.
  • Fixed version: rubygems (Debian:12) 3.2.0~rc.1-1; rubygems (Red Hat:enterprise_linux:6::client) 0:1.3.7-4.el6_4; rubygems (Red Hat:enterprise_mrg:2:computenode:el6) 0:1.8.23.2-1.el6.

Low priority for now. Upgrade to rubygems (Debian:12) 3.2.0~rc.1-1; rubygems (Red Hat:enterprise_linux:6::client) 0:1.3.7-4.el6_4; rubygems (Red Hat:enterprise_mrg:2:computenode:el6) 0:1.8.23.2-1.el6 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Algorithmic complexity vulnerability in Gem::Version::VERSION_PATTERN in lib/rubygems/version.rb in RubyGems before 1.8.23.1, 1.8.24 through 1.8.25, 2.0.x before 2.0.8, and 2.1.x before 2.1.0, as used in Ruby 1.9.0 through 2.0.0p247, allows remote attackers to cause a denial of service (CPU consumption) via a crafted gem version that triggers a large amount of backtracking in a regular expression.

MediumCVSS 4.3 · v2.0—No exploit Fix available
Published
Oct 17, 2013
Updated
Jun 16, 2026
EPSS
3.3% · 88th percentile

Report tools

JSON

Action score

18

Monitor

Low priority for now.

CVSS
17 / 40 · 4.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 3.3%

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
rubygemsrubygems
redhatenterprise linux
ruby-langruby

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • redhat enterprise linux6.0
  • ruby-lang ruby1.9
  • ruby-lang ruby1.9.1
  • ruby-lang ruby1.9.2
  • ruby-lang ruby1.9.3
  • ruby-lang ruby2.0
  • ruby-lang ruby2.0.0
  • rubygems rubygemsup to 1.8.23 inclusive
  • rubygems rubygems1.8.0
  • rubygems rubygems1.8.1
  • rubygems rubygems1.8.10
  • rubygems rubygems1.8.11
  • rubygems rubygems1.8.12
  • rubygems rubygems1.8.13
  • rubygems rubygems1.8.14
  • rubygems rubygems1.8.15
  • rubygems rubygems1.8.16
  • rubygems rubygems1.8.17
  • rubygems rubygems1.8.18
  • rubygems rubygems1.8.19

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12rubygemsbefore 3.2.0~rc.1-13.2.0~rc.1-1
Red Hat:enterprise_linux:6::clientrubygemsbefore 0:1.3.7-4.el6_40:1.3.7-4.el6_4
Red Hat:enterprise_mrg:2:computenode:el6rubygemsbefore 0:1.8.23.2-1.el60:1.8.23.2-1.el6
Red Hat:enterprise_mrg:2:server:el6cuminbefore 0:0.1.5787-4.el60:0.1.5787-4.el6
Red Hat:openshift:2.0::el6rubygemsbefore 0:1.8.24-5.el6op0:1.8.24-5.el6op
Red Hat:openshift:2.0::el6rubygems-develbefore 0:1.8.24-5.el6op0:1.8.24-5.el6op
Red Hat:openstack:3::el6ruby193-rubygemsbefore 0:1.8.24-9.el6ost0:1.8.24-9.el6ost
Red Hat:openstack:3::el6ruby193-rubygems-develbefore 0:1.8.24-9.el6ost0:1.8.24-9.el6ost
Red Hat:rhel_software_collections:1::el6ruby193-rubybefore 0:1.9.3.448-40.el60:1.9.3.448-40.el6
Red Hat:rhel_software_collections:1::el6ruby193-ruby-debuginfobefore 0:1.9.3.448-40.el60:1.9.3.448-40.el6
Red Hat:rhel_software_collections:1::el6ruby193-ruby-develbefore 0:1.9.3.448-40.el60:1.9.3.448-40.el6
Red Hat:rhel_software_collections:1::el6ruby193-ruby-docbefore 0:1.9.3.448-40.el60:1.9.3.448-40.el6
Red Hat:rhel_software_collections:1::el6ruby193-ruby-irbbefore 0:1.9.3.448-40.el60:1.9.3.448-40.el6
Red Hat:rhel_software_collections:1::el6ruby193-ruby-libsbefore 0:1.9.3.448-40.el60:1.9.3.448-40.el6
Red Hat:rhel_software_collections:1::el6ruby193-ruby-tcltkbefore 0:1.9.3.448-40.el60:1.9.3.448-40.el6
Red Hat:rhel_software_collections:1::el6ruby193-rubygem-bigdecimalbefore 0:1.1.0-40.el60:1.1.0-40.el6
Red Hat:rhel_software_collections:1::el6ruby193-rubygem-io-consolebefore 0:0.3-40.el60:0.3-40.el6
Red Hat:rhel_software_collections:1::el6ruby193-rubygem-jsonbefore 0:1.5.5-40.el60:1.5.5-40.el6
Red Hat:rhel_software_collections:1::el6ruby193-rubygem-minitestbefore 0:2.5.1-40.el60:2.5.1-40.el6
Red Hat:rhel_software_collections:1::el6ruby193-rubygem-rakebefore 0:0.9.2.2-40.el60:0.9.2.2-40.el6
Red Hat:rhel_software_collections:1::el6ruby193-rubygem-rdocbefore 0:3.9.5-40.el60:3.9.5-40.el6
Red Hat:rhel_software_collections:1::el6ruby193-rubygemsbefore 0:1.8.23-40.el60:1.8.23-40.el6
Red Hat:rhel_software_collections:1::el6ruby193-rubygems-develbefore 0:1.8.23-40.el60:1.8.23-40.el6
RubyGemsrubygems-updatefrom 1.8.24 · before 1.8.261.8.26

+3

Same product

rubygems: all records

Other highest-scoring records for the same primary product.

  • CVE-2017-0903RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability.
    44Plan
  • CVE-2017-0899RubyGems version 2.6.12 and earlier is vulnerable to maliciously crafted gem specifications that include terminal escape characters.
    42Plan
  • CVE-2018-1000076RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2012-2125Oct 1, 2013 · RubyGems before 1.8.23 can redirect HTTPS connections to HTTP, which makes it easier for remote attackers to observe or modify a gem during
    24Monitor
  • ← EarlierCVE-2012-2126Oct 1, 2013 · RubyGems before 1.8.23 does not verify an SSL certificate, which allows remote attackers to modify a gem during installation via a man-in-th
    17Monitor
  • Later →CVE-2013-4363Oct 17, 2013 · Algorithmic complexity vulnerability in Gem::Version::ANCHORED_VERSION_PATTERN in lib/rubygems/version.rb in RubyGems before 1.8.23.2, 1.8.2
    18Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:rubygems3.2.0~rc.1-1 · Debian:12Package registry (OSV)
red hat:ruby193-ruby0:1.9.3.448-40.el6 · Red Hat:rhel_software_collections:1::el6Package registry (OSV)
red hat:ruby193-ruby-debuginfo0:1.9.3.448-40.el6 · Red Hat:rhel_software_collections:1::el6Package registry (OSV)
red hat:ruby193-ruby-devel0:1.9.3.448-40.el6 · Red Hat:rhel_software_collections:1::el6Package registry (OSV)
red hat:ruby193-ruby-doc0:1.9.3.448-40.el6 · Red Hat:rhel_software_collections:1::el6Package registry (OSV)
red hat:ruby193-ruby-irb0:1.9.3.448-40.el6 · Red Hat:rhel_software_collections:1::el6Package registry (OSV)
red hat:ruby193-ruby-libs0:1.9.3.448-40.el6 · Red Hat:rhel_software_collections:1::el6Package registry (OSV)
red hat:ruby193-ruby-tcltk0:1.9.3.448-40.el6 · Red Hat:rhel_software_collections:1::el6Package registry (OSV)
red hat:ruby193-rubygem-bigdecimal0:1.1.0-40.el6 · Red Hat:rhel_software_collections:1::el6Package registry (OSV)
red hat:ruby193-rubygem-io-console0:0.3-40.el6 · Red Hat:rhel_software_collections:1::el6Package registry (OSV)
red hat:ruby193-rubygem-json0:1.5.5-40.el6 · Red Hat:rhel_software_collections:1::el6Package registry (OSV)
red hat:ruby193-rubygem-minitest0:2.5.1-40.el6 · Red Hat:rhel_software_collections:1::el6Package registry (OSV)
red hat:ruby193-rubygem-rake0:0.9.2.2-40.el6 · Red Hat:rhel_software_collections:1::el6Package registry (OSV)
RubyGems:rubygems-update1.8.23.1Package registry (OSV)
RubyGems:rubygems-update1.8.26Package registry (OSV)
RubyGems:rubygems-update2.0.8Package registry (OSV)
RubyGems:rubygems-update2.1.0Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

    If successful

    Confidentiality
    none
    Integrity
    none
    Availability
    P · the service can be disrupted
    Attack complexity
    M
    Confidentiality impact
    None
    Integrity impact
    None
    Availability impact
    P

    Weakness class (CWE)

    CWE-310 · Cryptographic Issues

    CVSS vector

    AV:N/AC:M/Au:N/C:N/I:N/A:P

    nvd-primary

    Attack context

    MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

    MITRE has no CAPEC/ATT&CK mapping for this CWE.

    Change log

    1. Fix✗ → ✓

    For records you follow, these changes also arrive as notifications. →

    References

    Show all references (8 more)

    Vendor advisories and official records. Exploit/PoC links are deliberately left out.

    All records