CVE-2023-23539

Code execution via unchecked DCERPC packet offsets

Published Jun 23, 2023 · Updated Dec 5, 2024

Buffer overflow in Apple macOS before 13.2 allows attackers to execute arbitrary code by mounting a crafted Samba network share. The DCERPC presentation-result-list parser uses packet-derived pointer offsets without range validation, permitting out-of-bounds reads before a later write check. User interaction is required to mount the share; Talos demonstrated a remotely triggerable rpcsvchost crash, while Apple reports arbitrary code execution.

CVSS severity7.8
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Apple macOS before 13.2 allows attackers to execute arbitrary code by mounting a crafted Samba network share. The DCERPC presentation-result-list parser uses packet-derived pointer offsets without range validation, permitting out-of-bounds reads before a later write check. User interaction is required to mount the share; Talos demonstrated a remotely triggerable rpcsvchost crash, while Apple reports arbitrary code execution.

The record

CVE
CVE-2023-23539
Published
Jun 23, 2023
Updated
Dec 5, 2024
Vendor
Apple
Product
macOS
Classifications
CWE-120, CWE-823, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 5, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <13.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · macOSversion=unspecified <13.2

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
5.9Cisco TalosCVSS:3.1/AV:N/AC:H/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-823Use of Out-of-range Pointer Offset
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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