CVE-2023-6481Public exploitNetwork attack vector

Service interruption via unfiltered nested object deserialization

Published Dec 4, 2023 · Updated Aug 2, 2024

Deserialization in the QOS.ch Logback receiver in 1.2.12, 1.3.13, and 1.4.13 allows remote attackers to interrupt service with poisoned data. HardenedObjectInputStream fails to initialize the object-input filter that limits array length and object-graph depth before reading nested objects. Exploitation requires an enabled, attacker-reachable receiver and can slow or stop logging in the hosting application.

CVSS severity7.1
High
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Deserialization in the QOS.ch Logback receiver in 1.2.12, 1.3.13, and 1.4.13 allows remote attackers to interrupt service with poisoned data. HardenedObjectInputStream fails to initialize the object-input filter that limits array length and object-graph depth before reading nested objects. Exploitation requires an enabled, attacker-reachable receiver and can slow or stop logging in the hosting application.

The record

CVE
CVE-2023-6481
Published
Dec 4, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 4, 2023CVE 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?

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

7.1GitHub Advisory DatabaseCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo