CVE-2021-30219Public exploit

Build process crash via NULL command dereference

Published Apr 29, 2021 · Updated Aug 3, 2024

A NULL pointer dereference in samurai 1.2 allows local users to crash the active build process via a crafted build file. The parser accepts an empty command value, so printstatus() substitutes the resulting NULL command pointer for an absent description and passes it to puts(). Execution requires a user to run samurai against the crafted file, terminating that build invocation without reported confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A NULL pointer dereference in samurai 1.2 allows local users to crash the active build process via a crafted build file. The parser accepts an empty command value, so printstatus() substitutes the resulting NULL command pointer for an absent description and passes it to puts(). Execution requires a user to run samurai against the crafted file, terminating that build invocation without reported confidentiality or integrity impact.

The record

CVE
CVE-2021-30219
Published
Apr 29, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 29, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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