CVE-2023-29487Public exploitNetwork attack vector

Process-correlation logging disruption via inefficient regular expression

Published Dec 21, 2023 · Updated Nov 26, 2024

Inefficient regular-expression processing in Heimdal Thor Agent allows remote attackers to disrupt Threat To Process Correlation logging. Public records do not identify the regular expression or input reported to trigger excessive processing in the Threat To Process Correlation module. Reachability requires the optional process-identification feature in Windows 3.4.2 and earlier or macOS 2.6.9 and earlier; Heimdal disputes any service interruption and describes only missing process identification in DNS logs.

CVSS severity9.1
Critical
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Inefficient regular-expression processing in Heimdal Thor Agent allows remote attackers to disrupt Threat To Process Correlation logging. Public records do not identify the regular expression or input reported to trigger excessive processing in the Threat To Process Correlation module. Reachability requires the optional process-identification feature in Windows 3.4.2 and earlier or macOS 2.6.9 and earlier; Heimdal disputes any service interruption and describes only missing process identification in DNS logs.

The record

CVE
CVE-2023-29487
Published
Dec 21, 2023
Updated
Nov 26, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-1333
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 21, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 26, 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

9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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-1333Inefficient Regular Expression Complexity

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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