CVE-2022-43343Public exploitNetwork attack vector

Process crash via script-mode token overflow

Published Nov 8, 2022 · Updated May 1, 2025

Global buffer overflow in N-Prolog 1.91 allows attackers to crash the interpreter with a crafted script-mode file. The gettoken() function in Main.c processes attacker-controlled token data without enforcing the global destination buffer boundary, producing an out-of-bounds write detected by AddressSanitizer. Exploitation requires NPL to parse the crafted file with its -s option; public evidence demonstrates a process crash but does not establish code execution.

CVSS severity7.5
High
EPSS probability1.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Global buffer overflow in N-Prolog 1.91 allows attackers to crash the interpreter with a crafted script-mode file. The gettoken() function in Main.c processes attacker-controlled token data without enforcing the global destination buffer boundary, producing an out-of-bounds write detected by AddressSanitizer. Exploitation requires NPL to parse the crafted file with its -s option; public evidence demonstrates a process crash but does not establish code execution.

The record

CVE
CVE-2022-43343
Published
Nov 8, 2022
Updated
May 1, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 8, 2022CVE publishedPublication date reported by the CVE source.
  2. May 1, 2025Record 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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NVDCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1203Exploitation for Client Execution

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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