CVE-2023-26141 – This vulnerability in Sidekiq versions before 7... (How to Fix)

Q: What is the severity of CVE-2023-26141?

CVE-2023-26141 has a CVSS score of 7.5 (HIGH). This vulnerability in Sidekiq versions before 7.1.3 allows attackers to cause a Denial of Service (DoS) by manipulating localStorage values in the dashboard-charts.js file, triggering excessive polling requests. Anyone running vulnerable Sidekiq versions with the web dashboard enabled is affected.

📋 TL;DR

This vulnerability in Sidekiq versions before 7.1.3 allows attackers to cause a Denial of Service (DoS) by manipulating localStorage values in the dashboard-charts.js file, triggering excessive polling requests. Anyone running vulnerable Sidekiq versions with the web dashboard enabled is affected.

💻 Affected Systems

Products:

Sidekiq

Versions: All versions before 7.1.3

Operating Systems: All

Default Config Vulnerable: ⚠️ Yes

Notes: Only affects installations with the Sidekiq web dashboard enabled.

📦 What is this software?

Sidekiq by Contribsys

View all CVEs affecting Sidekiq →

Sidekiq by Contribsys

View all CVEs affecting Sidekiq →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete service unavailability due to resource exhaustion from excessive polling requests overwhelming the server.

🟠

Likely Case

Degraded performance and intermittent service disruptions affecting job processing reliability.

🟢

If Mitigated

Minimal impact with proper rate limiting and monitoring in place.

🌐 Internet-Facing: HIGH - Web dashboard accessible from internet allows unauthenticated exploitation.

🏢 Internal Only: MEDIUM - Requires internal network access but still exploitable by authenticated users.

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Exploit requires access to the web dashboard interface but no authentication if dashboard is publicly accessible.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 7.1.3

Vendor Advisory: https://github.com/sidekiq/sidekiq/commit/62c90d7c5a7d8a378d79909859d87c2e0702bf89

Restart Required: Yes

Instructions:

1. Update Gemfile to 'gem "sidekiq", ">= 7.1.3"' 2. Run 'bundle update sidekiq' 3. Restart Sidekiq processes 4. Verify version with 'sidekiq --version'

🔧 Temporary Workarounds

Disable Web Dashboard

all

Remove or restrict access to the Sidekiq web dashboard interface

Remove require 'sidekiq/web' from routes or configure authentication

Implement Rate Limiting

all

Add rate limiting to dashboard endpoints

Configure web server (nginx/apache) rate limiting or use Rack::Attack

🧯 If You Can't Patch

Restrict network access to Sidekiq dashboard using firewall rules
Implement strong authentication and IP whitelisting for dashboard access

🔍 How to Verify

Check if Vulnerable:

Check if Sidekiq version is below 7.1.3 and web dashboard is enabled

Check Version:

sidekiq --version

Verify Fix Applied:

Confirm Sidekiq version is 7.1.3 or higher and test dashboard functionality

📡 Detection & Monitoring

Log Indicators:

Unusually high request frequency to /dashboard/charts endpoint
Increased CPU/memory usage on Sidekiq server

Network Indicators:

Spike in HTTP requests to dashboard endpoints
Abnormal polling patterns

SIEM Query:

source="sidekiq.log" AND "dashboard" AND ("polling" OR "charts") | stats count by src_ip

📊 Metadata

CVE ID: CVE-2023-26141

CVSS v3 Score: 7.5 (HIGH)

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

CWE: CWE-400

Published: September 14, 2023

Last Updated: November 21, 2024

🔗 References

https://gist.github.com/keeganparr1/1dffd3c017339b7ed5371ed3d81e6b2a Exploit
https://github.com/sidekiq/sidekiq/blob/6-x/web/assets/javascripts/dashboard.js%23L6 Broken Link
https://github.com/sidekiq/sidekiq/commit/62c90d7c5a7d8a378d79909859d87c2e0702bf89 Patch
https://security.snyk.io/vuln/SNYK-RUBY-SIDEKIQ-5885107 Third Party Advisory
https://gist.github.com/keeganparr1/1dffd3c017339b7ed5371ed3d81e6b2a Exploit
https://github.com/sidekiq/sidekiq/blob/6-x/web/assets/javascripts/dashboard.js%23L6 Broken Link
https://github.com/sidekiq/sidekiq/commit/62c90d7c5a7d8a378d79909859d87c2e0702bf89 Patch
https://security.snyk.io/vuln/SNYK-RUBY-SIDEKIQ-5885107 Third Party Advisory

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