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CVE-2023-6378 logback

Affected softwarelogback
Severity7.5 High CVSS 3.1 2 scores
Fixed in1.3.12, 1.4.12, 1.2.13
WeaknessDeserialization of untrusted data (CWE-502)
Published29 Nov 2023
Updated17 Jun 2026

Description

A serialization vulnerability in logback receiver component part of logback version 1.4.11 allows an attacker to mount a Denial-Of-Service attack by sending poisoned data.

Exploitation status

No public exploit

No exploit has been reported in the sources we check. Published 2 years ago.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC none indexed
  • EPSS 0.90% chance in 30 days

Waratek protection

Protected by Waratek

Waratek has a rule that blocks attacks on this vulnerability.

Decided by A vulnerability class already blocked by an ARMR security rule
Finding Protected by Waratek's ARMR deserialization DoS security rule, which blocks this class of attack at the JVM level without a rule written for this CVE specifically. The CVE's weakness is CWE-502: Deserialization of Untrusted Data. Impact is availability-only (no confidentiality or integrity loss), so this is the DoS variant of the class, not RCE — the ARMR DoS rule applies rather than the RCE rule pair.

How to mitigate CVE-2023-6378

Upgrade logback to a release that fixes it: 1.3.12, 1.4.12 or 1.2.13. Until you can, Waratek RASP blocks exploitation with its deserialization rule. It runs inside the Java application, with no code changes.

Waratek RASP Runtime protection for Java applications

CVSS

7.5 HIGH v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H NVD Primary published
CVSS 3.1 7.1 HIGH CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H vulnerability@ncsc.ch Secondary

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update April 2024 ↗ CPU 2024-Q2 Oracle Communications Applications / Patch (logback) (8.0.0.1.0)
Oracle Hospitality Applications / APIs (Helidon) (20.3.3, 20.3.4, 23.1.0, 23.1.1)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle Communications Applications Patch (logback) 8.0.0.1.0 8.0.0.1.0
Oracle Hospitality Applications APIs (Helidon) 20.3.3, 20.3.4, 23.1.0, 23.1.1 20.3.3 · 20.3.4 · 23.1.0 · 23.1.1

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
ch.qos.logback:logback-classic 1.3.0 1.3.12 unbounded
ch.qos.logback:logback-classic 1.4.0 1.4.12 unbounded
ch.qos.logback:logback-core 1.3.0 1.3.12 unbounded
ch.qos.logback:logback-core 1.4.0 1.4.12 unbounded
ch.qos.logback:logback-core 0 1.2.13 unbounded
ch.qos.logback:logback-classic 0 1.2.13 unbounded

Products and versions

3 products, 9 version entries
SourceVendorProductSchemeAffected versions
osv ch.qos.logback logback-classic generic < 1.2.13 · ≥ 1.3.0 and < 1.3.12 · ≥ 1.4.0 and < 1.4.12
osv ch.qos.logback logback-core generic < 1.2.13 · ≥ 1.3.0 and < 1.3.12 · ≥ 1.4.0 and < 1.4.12
nvd qos logback generic ≥ 1.2.0 and < 1.2.13 · ≥ 1.3.0 and < 1.3.12 · ≥ 1.4.0 and < 1.4.12

References

URLTags
https://github.com/qos-ch/logback/issues/745#issuecomment-1836227158 WEB
https://github.com/qos-ch/logback/commit/9c782b45be4abdafb7e17481e24e7354c2acd1eb WEB
https://github.com/qos-ch/logback/commit/b8eac23a9de9e05fb6d51160b3f46acd91af9731 WEB
https://github.com/qos-ch/logback/commit/bb095154be011267b64e37a1d401546e7cc2b7c3 WEB
https://github.com/qos-ch/logback PACKAGE
https://logback.qos.ch/manual/receivers.html WEB
https://logback.qos.ch/news.html#1.2.13 WEB
https://logback.qos.ch/news.html#1.3.12 WEB
https://security.netapp.com/advisory/ntap-20241129-0012 WEB
https://security.netapp.com/advisory/ntap-20241129-0012/

Timeline

Published2023-11-29By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.