CVE-2022-45909Network attack vector

Service crash via unterminated Request-URI buffer

Published Nov 26, 2022 · Updated Apr 25, 2025

Heap buffer over-read in drachtio-server before 0.8.19 allows remote attackers to crash the SIP service with a long INVITE Request-URI. normalizeSipUri passed a 255-byte strncpy result to sip_name_addr_d without ensuring NUL termination, so parsing continued past the copied Request-URI. No authentication or user interaction is required; one crafted SIP INVITE can crash the process, and the published assessment also records confidentiality loss.

CVSS severity9.1
Critical
EPSS probability1.02%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer over-read in drachtio-server before 0.8.19 allows remote attackers to crash the SIP service with a long INVITE Request-URI. normalizeSipUri passed a 255-byte strncpy result to sip_name_addr_d without ensuring NUL termination, so parsing continued past the copied Request-URI. No authentication or user interaction is required; one crafted SIP INVITE can crash the process, and the published assessment also records confidentiality loss.

The record

CVE
CVE-2022-45909
Published
Nov 26, 2022
Updated
Apr 25, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 26, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 25, 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

9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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