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Vulnerability Assessment

Impact

CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
Patch available 15.1% exploitation probability (EPSS)

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AnalysisAI

org.slf4j.ext.EventData in the slf4j-ext module in QOS.CH SLF4J before 1.8.0-beta2 allows remote attackers to bypass intended access restrictions via crafted data. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affected Packages

maven org.slf4j:slf4j-ext fix: 1.7.26, 1.8.0-beta4

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in maven

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

org.slf4j.ext.EventData in the slf4j-ext module in QOS.CH SLF4J before 1.8.0-beta2 allows remote attackers to bypass intended access restrictions via crafted data. EventData in the slf4j-ext module in QOS.CH SLF4J, has been fixed in SLF4J versions 1.7.26 later and in the 2.0.x series. Affected products include: Qos Slf4J, Redhat Jboss Enterprise Application Platform, Redhat Virtualization, Redhat Virtualization Host, Redhat Enterprise Linux Desktop. Version information: before 1.8.0.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionNVD

org.slf4j.ext.EventData in the slf4j-ext module in QOS.CH SLF4J before 1.8.0-beta2 allows remote attackers to bypass intended access restrictions via crafted data. EventData in the slf4j-ext module in QOS.CH SLF4J, has been fixed in SLF4J versions 1.7.26 later and in the 2.0.x series.

Threat Intelligence Overview

EPSS Score
15.1%
Top 4% exploitable
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 15.1%
Patch available Yes
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

64
Low Medium High Critical
KEV: 0
EPSS: +15
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)NVD

cpe:2.3:a:qos:slf4j:*:*:*:*:*:*:*:*
cpe:2.3:a:qos:slf4j:1.8.0:alpha1:*:*:*:*:*:*
cpe:2.3:a:qos:slf4j:1.8.0:alpha2:*:*:*:*:*:*
cpe:2.3:a:qos:slf4j:1.8.0:beta1:*:*:*:*:*:*
cpe:2.3:a:qos:slf4j:1.8.0:beta2:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.1:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:6.0.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:6.4.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:7.4:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:7.5:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:7.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:7.7:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.4:*:*:*:*:*:*:*
+ 13 more

References

Advisories & patches
PATCH https://github.com/qos-ch/slf4j/commit/d2b27fba88e983f921558da27fc29b5f5d269405 PATCH https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html ADVISORY https://jira.qos.ch/browse/SLF4J-430 ADVISORY https://jira.qos.ch/browse/SLF4J-431 REF http://www.securityfocus.com/bid/103737 REF http://www.securitytracker.com/id/1040627 REF https://access.redhat.com/errata/RHSA-2018:0582 REF https://access.redhat.com/errata/RHSA-2018:0592 REF https://access.redhat.com/errata/RHSA-2018:0627 REF https://access.redhat.com/errata/RHSA-2018:0628 REF https://access.redhat.com/errata/RHSA-2018:0629 REF https://access.redhat.com/errata/RHSA-2018:0630 REF https://access.redhat.com/errata/RHSA-2018:1247 REF https://access.redhat.com/errata/RHSA-2018:1248 REF https://access.redhat.com/errata/RHSA-2018:1249 REF https://access.redhat.com/errata/RHSA-2018:1251 REF https://access.redhat.com/errata/RHSA-2018:1323 REF https://access.redhat.com/errata/RHSA-2018:1447 REF https://access.redhat.com/errata/RHSA-2018:1448 REF https://access.redhat.com/errata/RHSA-2018:1449 REF https://access.redhat.com/errata/RHSA-2018:1450 REF https://access.redhat.com/errata/RHSA-2018:1451 REF https://access.redhat.com/errata/RHSA-2018:1525 REF https://access.redhat.com/errata/RHSA-2018:1575 REF https://access.redhat.com/errata/RHSA-2018:2143 REF https://access.redhat.com/errata/RHSA-2018:2419 REF https://access.redhat.com/errata/RHSA-2018:2420 REF https://access.redhat.com/errata/RHSA-2018:2669 REF https://access.redhat.com/errata/RHSA-2018:2930 REF https://access.redhat.com/errata/RHSA-2019:2413 REF https://access.redhat.com/errata/RHSA-2019:3140 REF https://lists.apache.org/thread.html/956ba8e76b6793a6670b2eb0129a5e3003ce2124ca3130fd57d48d0f%40%3Cdevnull.infra.apache.org%3E REF https://lists.apache.org/thread.html/95ce76613c869dbccf1d3d29327099ccc71aeec156f76c30853044fa%40%3Cdevnull.infra.apache.org%3E REF https://lists.apache.org/thread.html/r0f376559fd39cf1a53ac3afbc1fc5d62649dcac9916d4697445a94fa%40%3Cissues.zookeeper.apache.org%3E REF https://lists.apache.org/thread.html/r1660c72a660f0522947ca6ce329dcc74e1ee20c58bbe208472754489%40%3Ccommon-issues.hadoop.apache.org%3E REF https://lists.apache.org/thread.html/r17e7e6abc53d29c0e269153517d36f4bec2755b95900596e6df15cbe%40%3Cnotifications.iotdb.apache.org%3E REF https://lists.apache.org/thread.html/r2d05924f903403927a2f4e78d9b1249a42f0bd09f69a7c1954d74a42%40%3Creviews.iotdb.apache.org%3E REF https://lists.apache.org/thread.html/r32be21da011479df41468a62bc09d12f0d3b4e3a71679d33cb0e8c56%40%3Cissues.zookeeper.apache.org%3E REF https://lists.apache.org/thread.html/r37644f0a00aca9fbcbc21c0f9a91f927b63153ec3607be469cd515e5%40%3Creviews.iotdb.apache.org%3E REF https://lists.apache.org/thread.html/r48247c12cf652e95a01fc94ee5aa8641f3ec481235774790e53eb55e%40%3Creviews.iotdb.apache.org%3E REF https://lists.apache.org/thread.html/r573eb577a67503e72181eee637d9b0ac042197e632bcdfce76af06a3%40%3Cissues.flink.apache.org%3E REF https://lists.apache.org/thread.html/r5cf87a035b297c19f4043a37b73c341576dd92f819bd3e4aa27de541%40%3Cissues.flink.apache.org%3E REF https://lists.apache.org/thread.html/r767861f053c15f9e9201b939a0d508dd58475a072e76135eaaca17f0%40%3Ccommon-issues.hadoop.apache.org%3E REF https://lists.apache.org/thread.html/r81711cde77c2c5742b7b8533c978e79771b700af0ef4d3149d70df25%40%3Cnotifications.logging.apache.org%3E REF https://lists.apache.org/thread.html/r891761d5014f9ffd79d9737482de832462de538b6c4bdcef21aad729%40%3Cissues.flink.apache.org%3E REF https://lists.apache.org/thread.html/r9584c4304c888f651d214341a939bd264ed30c9e3d0d30fe85097ecf%40%3Ccommits.pulsar.apache.org%3E REF https://lists.apache.org/thread.html/r99a6552e45ca6ba1082031421f51799a4a665eda905ab2c2aa9d6ffa%40%3Cdev.flink.apache.org%3E REF https://lists.apache.org/thread.html/r9e25496608036573736cee484d8d03dae400f09e443b0000b6adc042%40%3Ccommits.iotdb.apache.org%3E REF https://lists.apache.org/thread.html/raabf1a00b2652575fca9fcb44166a828a0cab97a7d1594001eabc991%40%3Ccommon-issues.hadoop.apache.org%3E REF https://lists.apache.org/thread.html/rc378b97d52856f9f3c5ced14771fed8357e4187a3a0f9a2f0515931a%40%3Cissues.zookeeper.apache.org%3E REF https://lists.apache.org/thread.html/rc7de83170d3402af15bfed3d59f80aea20f250535bdce30e4cad24db%40%3Cissues.flink.apache.org%3E REF https://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26%40%3Ccommits.pulsar.apache.org%3E REF https://lists.apache.org/thread.html/rd86db9679150e9297b5c0fcb6f0e80a8b81b54fcf423de5a914bca78%40%3Ccommon-commits.hadoop.apache.org%3E REF https://lists.apache.org/thread.html/re6fb6b0de9d679310437ff87fc94e39da5a14dce9c73864a41837462%40%3Ccommon-commits.hadoop.apache.org%3E REF https://lists.apache.org/thread.html/reb3eeb985afdead17fadb7c33d5d472c1015a85ea5c9b038ec77f378%40%3Ccommon-dev.hadoop.apache.org%3E REF https://lists.apache.org/thread.html/rf58e1bee31d66665437dde9acd9abed53f8483034b69fa9ca7cde09c%40%3Cdev.zookeeper.apache.org%3E REF https://lists.apache.org/thread.html/rfb45527bad7220ada9e30957762e1da254ce405e67cc3ddf6f3558d9%40%3Creviews.iotdb.apache.org%3E REF https://lists.apache.org/thread.html/rfe52b7cbba4dcba521e13130e5d28d5818b78d70db0af1b470fa0264%40%3Ccommon-issues.hadoop.apache.org%3E REF https://security.netapp.com/advisory/ntap-20231227-0010/ REF https://www.oracle.com/security-alerts/cpujul2020.html REF https://www.oracle.com/security-alerts/cpuoct2020.html REF https://www.oracle.com/security-alerts/cpuoct2021.html REF https://www.slf4j.org/news.html

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