CVE-2023-3649Public exploit

Service crash via unbounded TargetAddress parsing

Published Jul 14, 2023 · Updated Nov 3, 2025

Buffer over-read in Wireshark 3.6.0 through 3.6.15 and 4.0.0 through 4.0.6 allows attackers to crash it via malformed iSCSI data. The iscsi_dissect_TargetAddress routine uses unbounded C-string searches while extracting an attacker-controlled TargetAddress value instead of bounded packet-buffer lookups. A malformed live packet can interrupt analysis without authentication, while the capture-file path requires a user to open the supplied trace.

CVSS severity5.3
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer over-read in Wireshark 3.6.0 through 3.6.15 and 4.0.0 through 4.0.6 allows attackers to crash it via malformed iSCSI data. The iscsi_dissect_TargetAddress routine uses unbounded C-string searches while extracting an attacker-controlled TargetAddress value instead of bounded packet-buffer lookups. A malformed live packet can interrupt analysis without authentication, while the capture-file path requires a user to open the supplied trace.

The record

CVE
CVE-2023-3649
Published
Jul 14, 2023
Updated
Nov 3, 2025
Vendor
Wireshark Foundation
Product
Wireshark
Classifications
CWE-125, CWE-126, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 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?

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

  1. Affected versionversion=4.0.0 <4.0.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Wireshark Foundation · Wiresharkversion=4.0.0 <4.0.7

Published CVSS scores

5.3GitLab Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
5.5NISTCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CWE-126Buffer Over-read
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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