CVE-2024-28854Public exploitNetwork attack vector

Service interruption via stalled handshake slots

Published Mar 15, 2024 · Updated Aug 2, 2024

Resource exhaustion in tmccombs tls-listener before 0.10.0 allows remote attackers to interrupt TLS services with idle TCP connections. The default TlsListener::new configuration caps concurrent handshakes at 64, so connections sending no TLS data occupy every slot for the 10-second timeout instead of allowing new connections. Any publicly reachable service using that default constructor can be blocked without authentication, while confidentiality and integrity remain unaffected.

CVSS severity7.5
High
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in tmccombs tls-listener before 0.10.0 allows remote attackers to interrupt TLS services with idle TCP connections. The default TlsListener::new configuration caps concurrent handshakes at 64, so connections sending no TLS data occupy every slot for the 10-second timeout instead of allowing new connections. Any publicly reachable service using that default constructor can be blocked without authentication, while confidentiality and integrity remain unaffected.

The record

CVE
CVE-2024-28854
Published
Mar 15, 2024
Updated
Aug 2, 2024
Vendor
tmccombs
Product
tls-listener
Classifications
CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 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

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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=0 <0.10.0
  2. Affected versionversion=< 0.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

tmccombs · tls-listenerversion=0 <0.10.0; version=< 0.10.0

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5GitHub, Inc.CVSS: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 exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.003Application Exhaustion Flood

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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