CVE-2024-3120Public exploitNetwork attack vector

Remote code execution via unchecked SIP header copies

Published Apr 9, 2024 · Updated Feb 21, 2025

Stack-buffer overflow in Irontec sngrep 1.4.1 through 1.8.0 allows remote attackers to execute code or crash the process via crafted SIP messages. In sip_validate_packet and sip_parse_extra_headers, match lengths from Content-Length and Warning headers drive strncpy into fixed-size stack buffers without bounds checks. Processing an attacker-controlled SIP packet during live capture or PCAP viewing is sufficient; successful exploitation grants code execution, while failed attempts can terminate the viewer.

CVSS severity9.0
Critical
EPSS probability1.85%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-buffer overflow in Irontec sngrep 1.4.1 through 1.8.0 allows remote attackers to execute code or crash the process via crafted SIP messages. In sip_validate_packet and sip_parse_extra_headers, match lengths from Content-Length and Warning headers drive strncpy into fixed-size stack buffers without bounds checks. Processing an attacker-controlled SIP packet during live capture or PCAP viewing is sufficient; successful exploitation grants code execution, while failed attempts can terminate the viewer.

The record

CVE
CVE-2024-3120
Published
Apr 9, 2024
Updated
Feb 21, 2025
Vendor
Irontec
Product
sngrep
Classifications
CWE-120, CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 21, 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=1.4.1 <=1.8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Irontec · sngrepversion=1.4.1 <=1.8.0

Published CVSS scores

9.0PentrazeCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
9.8NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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.

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

No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 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')
CWE-787Out-of-bounds Write
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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