CVE-2023-36273Public exploitNetwork attack vector

Process crash via out-of-bounds CRC read

Published Jun 23, 2023 · Updated Dec 2, 2024

Heap buffer overflow in bit_calc_CRC in GNU LibreDWG 0.12.5 allows context-dependent attackers to crash dwg2dxf via a crafted DWG file. During pre-R13 auxiliary-header decoding, bit_calc_CRC reads a caller-supplied CRC range beyond the heap allocation. Processing the crafted file is required, and the demonstrated consequence is termination of the converter process.

CVSS severity8.8
High
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in bit_calc_CRC in GNU LibreDWG 0.12.5 allows context-dependent attackers to crash dwg2dxf via a crafted DWG file. During pre-R13 auxiliary-header decoding, bit_calc_CRC reads a caller-supplied CRC range beyond the heap allocation. Processing the crafted file is required, and the demonstrated consequence is termination of the converter process.

The record

CVE
CVE-2023-36273
Published
Jun 23, 2023
Updated
Dec 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 2, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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 exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002Malicious File

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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