CVE-2023-6324Public exploit

Authentication bypass via known empty-buffer PSK

Published May 15, 2024 · Updated Aug 2, 2024

Authentication bypass in affected ThroughTek Kalay SDK releases allows local users to establish a DTLS session without its secret. The PSK-identity handler leaves its input buffer empty for an unexpected identity, hashes that buffer with SHA-256, and accepts the resulting known digest as the session PSK. Reachability requires the device's P2P ID and AuthKey; success grants the same command privileges as a legitimate client.

CVSS severity8.1
High
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in affected ThroughTek Kalay SDK releases allows local users to establish a DTLS session without its secret. The PSK-identity handler leaves its input buffer empty for an unexpected identity, hashes that buffer with SHA-256, and accepts the resulting known digest as the session PSK. Reachability requires the device's P2P ID and AuthKey; success grants the same command privileges as a legitimate client.

The record

CVE
CVE-2023-6324
Published
May 15, 2024
Updated
Aug 2, 2024
Vendor
ThroughTek
Product
Kalay SDK
Classifications
CWE-908, CWE-457, CAPEC-153, T1210
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. May 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.1.10.0
  2. Affected versionversion=3.1.10.0 <=3.1.10.16
  3. Affected versionversion=3.2.0.0
  4. Affected versionversion=3.2.0.0 <=3.3.6.1
  5. Affected versionversion=3.4.0.0
  6. Affected versionversion=3.4.0.0 <=3.4.7.3
  7. Affected versionversion=4.0.0.0
  8. Affected versionversion=4.0.0.0 <=4.3.3.1

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

ThroughTek · Kalay SDKversion=3.1.10.0; version=3.1.10.0 <=3.1.10.16; version=3.2.0.0; version=3.2.0.0 <=3.3.6.1; version=3.4.0.0; version=3.4.0.0 <=3.4.7.3; version=4.0.0.0; version=4.0.0.0 <=4.3.3.1

Published CVSS scores

8.1Bitdefender CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/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.

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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)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-908Use of Uninitialized Resource
CWE-457Use of Uninitialized Variable
CAPEC-153Input Data Manipulation
T1210Exploitation of Remote Services

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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