CVE-2022-23097Network attack vector

Memory disclosure or service crash via DNS reply

Published Jan 28, 2022 · Updated Nov 19, 2024

Out-of-bounds read in the DNS proxy of ConnMan 1.40 and earlier allows remote attackers to disclose memory or crash connmand via crafted DNS replies. In dnsproxy.c, forward_dns_reply trusts an attacker-controlled host length and calls strnlen from a pointer beyond the received packet without verifying sufficient bytes. Control of a DNS server or spoofed replies is required; UDP processing can return stack data to a controlled DNS client, while TCP processing can crash connmand.

CVSS severity9.1
Critical
EPSS probability2.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the DNS proxy of ConnMan 1.40 and earlier allows remote attackers to disclose memory or crash connmand via crafted DNS replies. In dnsproxy.c, forward_dns_reply trusts an attacker-controlled host length and calls strnlen from a pointer beyond the received packet without verifying sufficient bytes. Control of a DNS server or spoofed replies is required; UDP processing can return stack data to a controlled DNS client, while TCP processing can crash connmand.

The record

CVE
CVE-2022-23097
Published
Jan 28, 2022
Updated
Nov 19, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Nov 19, 2024Record 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

9.1UbuntuCVSS: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 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-125Out-of-bounds Read

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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