CVE-2020-9385Public exploitNetwork attack vector

Process crash via repeated EAN add-on delimiter

Published Feb 24, 2020 · Updated Aug 4, 2024

NULL pointer dereference in Zint 2.7.1 allows attackers to crash barcode generation by supplying malformed EAN input. The add_on function in upcean.c uses a second plus sign to produce an invalid array index, then passes the resulting null pointer to strcpy. Applications that pass attacker-controlled EAN data to libzint expose the condition, terminating the encoding process.

CVSS severity7.5
High
EPSS probability1.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Zint 2.7.1 allows attackers to crash barcode generation by supplying malformed EAN input. The add_on function in upcean.c uses a second plus sign to produce an invalid array index, then passes the resulting null pointer to strcpy. Applications that pass attacker-controlled EAN data to libzint expose the condition, terminating the encoding process.

The record

CVE
CVE-2020-9385
Published
Feb 24, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 24, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

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Technologies

Your stack

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Your stack

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