CVE-2022-47516Network attack vector

Unauthenticated daemon crash via crafted UDP

Published Dec 18, 2022 · Updated Apr 17, 2025

Denial of service in drachtio-server before 0.8.20 allows remote attackers to crash the daemon via a crafted UDP message. The libsofia-sip-ua/tport/tport.c transport code reaches a self assertion when processing the malformed datagram, terminating the service. The attack requires network reachability to the UDP listener and produces service interruption without reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability1.65%
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 drachtio-server before 0.8.20 allows remote attackers to crash the daemon via a crafted UDP message. The libsofia-sip-ua/tport/tport.c transport code reaches a self assertion when processing the malformed datagram, terminating the service. The attack requires network reachability to the UDP listener and produces service interruption without reported data disclosure or modification.

The record

CVE
CVE-2022-47516
Published
Dec 18, 2022
Updated
Apr 17, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-617, T1499.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NVDCVSS: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-617Reachable Assertion
T1499.002Service Exhaustion

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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