Vulnerabilities in pkg:gem/easymon

PACKAGE
Advisory Identifier: GHSA-c289-47qf-rvrr
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Advisory Summary

CVE-2018-1000855 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Easymon libraries in the RubyGems ecosystem. The issue involves cross site scripting (xss) vulnerability in easymon. Remediation is available by upgrading affected packages to version 1.4.1.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:gem/easymon

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:gem/easymon. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-c289-47qf-rvrr CVE-2018-1000855 MODERATE Cross Site Scripting (XSS) vulnerability in easymon

CVE-2018-1000855 at a Glance

CVE Identifier CVE-2018-1000855
GHSA Identifier GHSA-c289-47qf-rvrr
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Easymon
Package Ecosystem RubyGems
Published Date
Last Updated

Security Impact

CVSS: 6.1

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:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2018-1000855

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

easymon fixed: 1.4.1 
Upgrade easymon to 1.4.1
Verify Direct and Transitive Dependencies

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

inspect dependencies for easymon

How to Check if You Are Affected

To determine whether your application is affected by CVE-2018-1000855, inspect your project dependencies for Easymon:

inspect dependencies for easymon

Analyze the terminal output to locate any version of Easymon in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.4.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Easymon, 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

easymon version 1.4 and earlier contains a Cross Site Scripting (XSS) vulnerability in Endpoint where monitoring is mounted that can result in Reflected XSS that affects Firefox. Can be used to steal cookies, depending on the cookie settings.. This attack appear to be exploitable via The victim must click on a crafted URL that contains the XSS payload. This vulnerability appears to have been fixed in 1.4.1 and later.

CVE-2018-1000855 Affected Easymon Versions

1 component(s)
Fixed Versions:
1.4.1
Product / Package Ecosystem Affected Versions Fixed Version
easymon
gem/easymon
RubyGems
< 1.4.1
1.4.1

References

NVD — CVE-2018-1000855 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-1000855
Easymon Source Repository REPOSITORY
https://github.com/basecamp/easymon/issues/26
Easymon Source Repository REPOSITORY
https://github.com/basecamp/easymon/pull/25
Easymon Source Repository REPOSITORY
https://github.com/basecamp/easymon
Easymon Source Repository REPOSITORY
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/easymon/CVE-2018-1000855.yml

Frequently Asked Questions

What is CVE-2018-1000855?
CVE-2018-1000855 is a security vulnerability in Easymon involving Cross Site Scripting (XSS) vulnerability in easymon under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Easymon versions are affected?
Affected versions include releases prior to 1.4.1 across affected packages: easymon.
What version fixes CVE-2018-1000855?
Upgrading to 1.4.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is easymon affected?
Yes, easymon is affected in releases prior to 1.4.1. Upgrade your dependency to 1.4.1 or later.
What is the CVSS score of CVE-2018-1000855?
CVE-2018-1000855 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2018-1000855?
CVE-2018-1000855 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check RubyGems dependencies for CVE-2018-1000855?
Run the dependency tree command: 'inspect dependencies for easymon'. 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-c289-47qf-rvrr",
  "modified" : "2022-09-14T22:23:27Z",
  "published" : "2018-12-21T17:46:03Z",
  "aliases" : [ "CVE-2018-1000855" ],
  "summary" : "Cross Site Scripting (XSS) vulnerability in easymon",
  "details" : "easymon version 1.4 and earlier contains a Cross Site Scripting (XSS) vulnerability in Endpoint where monitoring is mounted that can result in Reflected XSS that affects Firefox. Can be used to steal cookies, depending on the cookie settings.. This attack appear to be exploitable via The victim must click on a crafted URL that contains the XSS payload. This vulnerability appears to have been fixed in 1.4.1 and later.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "easymon"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.4.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-1000855"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/basecamp/easymon/issues/26"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/basecamp/easymon/pull/25"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/basecamp/easymon"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/easymon/CVE-2018-1000855.yml"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:29:57Z",
    "nvd_published_at" : null
  }
}