CVE-2023-0415Public exploitNetwork attack vector

Crash via null iSCSI opcode string

Published Jan 24, 2023 · Updated Nov 3, 2025

Denial of service in the iSCSI dissector in Wireshark 3.6.0 through 3.6.10 and 4.0.0 through 4.0.2 allows attackers to crash it. For an unrecognized iSCSI opcode, dissect_iscsi_pdu passes a null string returned by try_val_to_str into col_append_str, which dereferences it through strlen. A remote attacker must inject a malformed iSCSI packet into analyzed traffic, or a context-dependent attacker must convince an operator to open a crafted capture file; the bounded consequence is termination of Wireshark or TShark.

CVSS severity6.3
Medium
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the iSCSI dissector in Wireshark 3.6.0 through 3.6.10 and 4.0.0 through 4.0.2 allows attackers to crash it. For an unrecognized iSCSI opcode, dissect_iscsi_pdu passes a null string returned by try_val_to_str into col_append_str, which dereferences it through strlen. A remote attacker must inject a malformed iSCSI packet into analyzed traffic, or a context-dependent attacker must convince an operator to open a crafted capture file; the bounded consequence is termination of Wireshark or TShark.

The record

CVE
CVE-2023-0415
Published
Jan 24, 2023
Updated
Nov 3, 2025
Vendor
Wireshark Foundation
Product
Wireshark
Classifications
CWE-404, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 24, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=>=3.6.0, <3.6.11
  2. Affected versionversion=>=4.0.0, <4.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wireshark Foundation · Wiresharkversion=>=3.6.0, <3.6.11; version=>=4.0.0, <4.0.3

Published CVSS scores

6.3GitLab Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
6.5NIST NVDCVSS:3.1/AV:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release
T1499.004Application 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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