CVE-2024-35434Network attack vector

Application crash via unchecked SIP packet payload

Published May 29, 2024 · Updated Feb 13, 2025

Heap-based buffer overflow in Irontec sngrep 1.8.1 allows remote attackers to crash the application with a crafted SIP packet. The rtp_check_packet function reads four bytes beyond its heap allocation while parsing malformed packet data without validating the available payload length. The parser must inspect attacker-supplied traffic during live capture or PCAP analysis; the documented consequence is an sngrep process crash.

CVSS severity7.5
High
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Irontec sngrep 1.8.1 allows remote attackers to crash the application with a crafted SIP packet. The rtp_check_packet function reads four bytes beyond its heap allocation while parsing malformed packet data without validating the available payload length. The parser must inspect attacker-supplied traffic during live capture or PCAP analysis; the documented consequence is an sngrep process crash.

The record

CVE
CVE-2024-35434
Published
May 29, 2024
Updated
Feb 13, 2025
Vendor
Irontec
Product
sngrep
Classifications
CWE-122, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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=1.8.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Irontec · sngrepversion=1.8.1

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1499.004Application or System Exploitation

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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