CVE-2013-1437Network attack vector

Arbitrary Perl code execution via $VERSION evaluation

Published Jan 28, 2020 · Updated Aug 6, 2024

Eval injection in Perl Toolchain Gang Module::Metadata before 1.000015 allows remote attackers to execute arbitrary Perl code via $VERSION. The version extraction path parses a module file, extracts code from its $VERSION assignment, and evaluates that code to obtain the version value. Exposure requires a consuming application to process an attacker-controlled Perl module; upstream documents the evaluation as intended behavior.

CVSS severity9.8
Critical
EPSS probability2.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Eval injection in Perl Toolchain Gang Module::Metadata before 1.000015 allows remote attackers to execute arbitrary Perl code via $VERSION. The version extraction path parses a module file, extracts code from its $VERSION assignment, and evaluates that code to obtain the version value. Exposure requires a consuming application to process an attacker-controlled Perl module; upstream documents the evaluation as intended behavior.

The record

CVE
CVE-2013-1437
Published
Jan 28, 2020
Updated
Aug 6, 2024
Vendor
Perl Toolchain Gang
Product
Module::Metadata
Classifications
CWE-74, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 28, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=before 1.000015

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Perl Toolchain Gang · Module::Metadataversion=before 1.000015

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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