CVE-2018-8088: Slf4j ext Improper Access Control Vulnerability

Q: What is CVE-2018-8088?

CVE-2018-8088 is a security vulnerability in Slf4j ext involving Improper Access Control in SLF4J under CWE-284: Improper Access Control.

Q: Which Slf4j ext versions are affected?

Affected versions include releases prior to 1.7.26, 1.8.0-beta4 across affected packages: org.slf4j:slf4j-ext.

Q: What version fixes CVE-2018-8088?

Upgrading to 1.7.26, 1.8.0-beta4 (or the latest patched release for your respective branch) resolves the vulnerability.

Q: Is slf4j-ext affected?

Yes, org.slf4j:slf4j-ext is affected in releases prior to 1.7.26, 1.8.0-beta4. Upgrade your dependency to 1.7.26, 1.8.0-beta4 or later.

Q: What is the CVSS score of CVE-2018-8088?

CVE-2018-8088 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Q: What CWE is associated with CVE-2018-8088?

CVE-2018-8088 is classified under CWE-284: Improper Access Control (The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.).

Q: How can I check Maven dependencies for CVE-2018-8088?

Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.slf4j'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.

CRITICAL

Advisory Identifier: GHSA-w77p-8cfg-2x43

CVSS 9.8

CWE-284

Published 2022-05-13

Advisory Summary

CVE-2018-8088 is a CRITICAL (CVSS 9.8) improper access control vulnerability (CWE-284: Improper Access Control) affecting Slf4j ext libraries in the Maven ecosystem. The issue involves improper access control in slf4j. Remediation is available by upgrading affected packages to version 1.7.26, 1.8.0-beta4.

CVE-2018-8088 at a Glance

CVE Identifier CVE-2018-8088

GHSA Identifier GHSA-w77p-8cfg-2x43

Severity CRITICAL

CVSS v3.1 Base Score 9.8

CWE Classification CWE-284: Improper Access Control

Affected Product Slf4j ext

Package Ecosystem Maven

Published Date 2022-05-13

Last Updated 2022-06-29

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)

Attack Complexity Low (AC:L)

Privileges Required None (PR:N)

User Interaction None (UI:N)

Scope Unchanged (S:U)

Confidentiality High (C:H)

Integrity High (I:H)

Availability High (A:H)

How to Fix CVE-2018-8088

To remediate this vulnerability, upgrade all affected Slf4j ext dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.slf4j:slf4j-ext fixed: 1.7.26

<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-ext</artifactId>
    <version>1.7.26</version>
</dependency>

org.slf4j:slf4j-ext fixed: 1.8.0-beta4

<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-ext</artifactId>
    <version>1.8.0-beta4</version>
</dependency>

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release:

mvn dependency:tree -Dincludes=org.slf4j

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2018-8088, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.slf4j

Analyze the terminal output to locate any version of Slf4j ext in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.7.26), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.slf4j command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-284: Improper Access Control, where the product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. In Slf4j ext, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

org.slf4j.ext.EventData in the slf4j-ext module in QOS.CH SLF4J before `1.8.0-beta4` 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 version `1.7.26` and later and in the `2.0.x` series. Note that while the [fix commit](https://github.com/qos-ch/slf4j/commit/d2b27fba88e983f921558da27fc29b5f5d269405) is associated with the tag `1.8.0-beta3`, the versions in [Maven](https://mvnrepository.com/artifact/org.slf4j/slf4j-ext) go directly from `1.8.0-beta2` to `1.8.0-beta4`.

CVE-2018-8088 Affected Slf4j ext Versions

2 component(s)

Fixed Versions:

1.7.261.8.0-beta4

Product / Package	Ecosystem	Affected Versions	Fixed Version
org.slf4j:slf4j-ext maven/org.slf4j/slf4j-ext	Maven	< 1.7.26	1.7.26
org.slf4j:slf4j-ext maven/org.slf4j/slf4j-ext	Maven	≥ 1.8.0-alpha0 < 1.8.0-beta4	1.8.0-beta4

References

access.redhat.com/errata/rhsa-2018:14... WEB

https://access.redhat.com/errata/RHSA-2018:1448

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https://access.redhat.com/errata/RHSA-2018:1447

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access.redhat.com/errata/rhsa-2018:12... WEB

https://access.redhat.com/errata/RHSA-2018:1248

access.redhat.com/errata/rhsa-2018:12... WEB

https://access.redhat.com/errata/RHSA-2018:1247

NVD — CVE-2018-8088 NVD

https://nvd.nist.gov/vuln/detail/CVE-2018-8088

Security Fix Commit FIX COMMIT

https://github.com/qos-ch/slf4j/commit/d2b27fba88e983f921558da27fc29b5f5d269405

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www.slf4j.org/news.html WEB

https://www.slf4j.org/news.html

Slf4j ext Security Information SECURITY

https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html

Slf4j ext Security Information SECURITY

https://www.oracle.com/security-alerts/cpuoct2021.html

Slf4j ext Security Information SECURITY

https://www.oracle.com/security-alerts/cpuoct2020.html

Slf4j ext Security Information SECURITY

https://www.oracle.com/security-alerts/cpujul2020.html

Slf4j ext Security Information SECURITY

https://security.netapp.com/advisory/ntap-20231227-0010

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access.redhat.com/errata/rhsa-2018:26... WEB

https://access.redhat.com/errata/RHSA-2018:2669

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https://access.redhat.com/errata/RHSA-2018:1575

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https://access.redhat.com/errata/RHSA-2018:1525

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https://access.redhat.com/errata/RHSA-2018:1451

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https://access.redhat.com/errata/RHSA-2018:1449

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https://access.redhat.com/errata/RHSA-2018:0629

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jira.qos.ch/browse/slf4j-431 WEB

https://jira.qos.ch/browse/SLF4J-431

jira.qos.ch/browse/slf4j-430 WEB

https://jira.qos.ch/browse/SLF4J-430

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https://access.redhat.com/errata/RHSA-2019:3140

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https://access.redhat.com/errata/RHSA-2019:2413

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https://access.redhat.com/errata/RHSA-2018:2930

Slf4j ext Security Information SECURITY

http://www.securityfocus.com/bid/103737

Slf4j ext Security Information SECURITY

http://www.securitytracker.com/id/1040627

Frequently Asked Questions

What is CVE-2018-8088?

CVE-2018-8088 is a security vulnerability in Slf4j ext involving Improper Access Control in SLF4J under CWE-284: Improper Access Control.

Which Slf4j ext versions are affected?

Affected versions include releases prior to 1.7.26, 1.8.0-beta4 across affected packages: org.slf4j:slf4j-ext.

What version fixes CVE-2018-8088?

Upgrading to 1.7.26, 1.8.0-beta4 (or the latest patched release for your respective branch) resolves the vulnerability.

Is slf4j-ext affected?

Yes, org.slf4j:slf4j-ext is affected in releases prior to 1.7.26, 1.8.0-beta4. Upgrade your dependency to 1.7.26, 1.8.0-beta4 or later.

What is the CVSS score of CVE-2018-8088?

CVE-2018-8088 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

What CWE is associated with CVE-2018-8088?

CVE-2018-8088 is classified under CWE-284: Improper Access Control (The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.).

How can I check Maven dependencies for CVE-2018-8088?

Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.slf4j'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.

Machine-readable OSV JSON OSV v1.5 Schema

Normalized schema output

View Raw JSON

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-w77p-8cfg-2x43",
  "modified" : "2022-06-29T18:51:39Z",
  "published" : "2022-05-13T01:04:09Z",
  "aliases" : [ "CVE-2018-8088" ],
  "summary" : "Improper Access Control in SLF4J",
  "details" : "org.slf4j.ext.EventData in the slf4j-ext module in QOS.CH SLF4J before `1.8.0-beta4` 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 version `1.7.26` and later and in the `2.0.x` series.\n\nNote that while the [fix commit](https://github.com/qos-ch/slf4j/commit/d2b27fba88e983f921558da27fc29b5f5d269405) is associated with the tag `1.8.0-beta3`, the versions in [Maven](https://mvnrepository.com/artifact/org.slf4j/slf4j-ext) go directly from `1.8.0-beta2` to `1.8.0-beta4`.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
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      "name" : "org.slf4j:slf4j-ext"
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  "database_specific" : {
    "cwe_ids" : [ "CWE-284" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-06-29T18:51:39Z",
    "nvd_published_at" : "2018-03-20T16:29:00Z"
  }
}

CVSS V3

9.8 CRITICAL

Attack Vector Network (AV:N)

Attack Complexity Low (AC:L)

Privileges Required None (PR:N)

User Interaction None (UI:N)

Scope Unchanged (S:U)

Confidentiality High (C:H)

Integrity High (I:H)

Availability High (A:H)

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Advisory Metadata

Source ID: GHSA-w77p-8cfg-2x43
Schema Version: 1.4.0
Published: 2022-05-13 01:04
Last Modified: 2022-06-29 18:51
Database Record File: advisories/github-reviewed/2022/05/GHSA-w77p-8cfg-2x43/GHSA-w77p-8cfg-2x43.json