CVE-2024-49580
📋 TL;DR
The CVE-2024-49580 vulnerability in JetBrains Ktor's HttpCache Plugin involves improper caching that could allow unauthorized disclosure of cached HTTP responses. This affects applications using Ktor with the HttpCache Plugin enabled, potentially exposing sensitive response data to attackers who can access cached content.
💻 Affected Systems
- JetBrains Ktor
📦 What is this software?
Ktor by Jetbrains
⚠️ Risk & Real-World Impact
Worst Case
Sensitive user data, authentication tokens, or private API responses could be exposed to unauthorized parties through cached HTTP responses.
Likely Case
Information disclosure of cached HTTP responses containing user-specific or application data that should not be publicly accessible.
If Mitigated
Limited exposure of non-sensitive cached content with proper cache controls and isolation.
🎯 Exploit Status
Exploitation requires access to cached HTTP responses, which may be accessible depending on cache configuration and storage.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.3.13
Vendor Advisory: https://www.jetbrains.com/privacy-security/issues-fixed/
Restart Required: Yes
Instructions:
1. Update Ktor dependency to version 2.3.13 or later in your build configuration (e.g., build.gradle or pom.xml). 2. Rebuild and redeploy your application. 3. Restart the application server.
🔧 Temporary Workarounds
Disable HttpCache Plugin
allTemporarily disable the HttpCache Plugin to eliminate the vulnerability until patching is possible.
Remove or comment out HttpCache plugin configuration in your Ktor application code.
🧯 If You Can't Patch
- Disable the HttpCache Plugin entirely in your Ktor application configuration.
- Implement additional access controls or encryption for cached data storage.
🔍 How to Verify
Check if Vulnerable:
Check your Ktor dependency version in build files; if using version <2.3.13 with HttpCache Plugin enabled, you are vulnerable.Check Version:
Check build.gradle.kts, build.gradle, or pom.xml for 'ktor' dependency version.Verify Fix Applied:
Verify that Ktor version is 2.3.13 or higher in your dependency management file and that the application runs without errors.📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to cached HTTP endpoints or errors related to cache retrieval.
Network Indicators:
- Requests attempting to access cached responses with unusual parameters or headers.
SIEM Query:
Search for access logs showing repeated requests to the same endpoints with cache-related headers.