CVE-2024-6915: JFrog Artifactory Cache Poisoning Vulnerability

CVE-2024-6915 Overview

CVE-2024-6915 is a critical Improper Input Validation vulnerability affecting multiple versions of JFrog Artifactory, a widely deployed artifact repository manager used in software development and DevOps pipelines. The vulnerability could potentially lead to cache poisoning, allowing attackers to compromise the integrity of cached artifacts served by vulnerable Artifactory instances.

Critical Impact

This vulnerability enables network-based attackers to poison the Artifactory cache without authentication, potentially compromising software supply chain integrity and affecting downstream systems that rely on cached artifacts.

Affected Products

• JFrog Artifactory versions below 7.90.6
• JFrog Artifactory versions below 7.84.20
• JFrog Artifactory versions below 7.77.14
• JFrog Artifactory versions below 7.71.23
• JFrog Artifactory versions below 7.68.22
• JFrog Artifactory versions below 7.63.22
• JFrog Artifactory versions below 7.59.23
• JFrog Artifactory versions below 7.55.18

Discovery Timeline

• 2024-08-05 - CVE-2024-6915 published to NVD
• 2024-08-06 - Last updated in NVD database

Technical Details for CVE-2024-6915

Vulnerability Analysis

This vulnerability stems from improper input validation (CWE-20) in JFrog Artifactory's request handling mechanisms. When processing incoming requests, the application fails to adequately validate certain input parameters, which can be exploited by attackers to manipulate cached content. The network-accessible nature of this vulnerability means that remote attackers can exploit it without requiring any authentication or user interaction, while the changed scope indicates the vulnerability can affect resources beyond the vulnerable component itself.

Cache poisoning attacks against artifact repositories are particularly dangerous in software development environments. Successful exploitation could allow attackers to inject malicious artifacts into the cache, which would then be served to legitimate users and build systems requesting those artifacts. This creates significant supply chain security risks, as compromised dependencies could propagate to production systems.

Root Cause

The root cause of CVE-2024-6915 lies in insufficient input validation within JFrog Artifactory's caching layer. The application does not properly sanitize or validate input data used in cache key generation or cache lookup operations. This allows specially crafted requests to bypass intended caching boundaries, enabling attackers to store or retrieve arbitrary cached content.

The CWE-20 (Improper Input Validation) classification indicates that the vulnerability occurs when the software receives input or data but does not validate or incorrectly validates that the input has the properties required to process the data safely and correctly.

Attack Vector

The attack vector for this vulnerability is network-based, requiring no authentication or user interaction. An attacker can craft malicious HTTP requests to a vulnerable JFrog Artifactory instance to manipulate the caching behavior. The attack exploits the improper input validation to either:

1. Inject malicious content into the cache that will be served to subsequent requesters
2. Manipulate cache keys to cause cache confusion between different artifacts
3. Poison cached responses to redirect users to malicious artifacts

The vulnerability mechanism exploits the improper handling of request parameters by the Artifactory caching system. When a malicious request is processed, the lack of proper validation allows the attacker to influence how content is stored and retrieved from the cache. For detailed technical information, refer to the JFrog Security Advisory.

Detection Methods for CVE-2024-6915

Indicators of Compromise

• Unusual or unexpected artifacts appearing in repository caches that were not explicitly uploaded by authorized users
• Discrepancies between artifact checksums in the cache versus the original source repositories
• Unexpected HTTP request patterns targeting caching endpoints with malformed or unusual parameters
• Log entries showing cache operations for artifacts that should not exist or have suspicious naming patterns

Detection Strategies

• Monitor Artifactory access logs for unusual request patterns, particularly requests with abnormal headers or query parameters targeting cached resources
• Implement integrity verification by comparing artifact checksums against known-good values from upstream sources
• Deploy network-level detection rules to identify potential cache poisoning attempts based on request characteristics
• Use SentinelOne Singularity XDR to detect anomalous behavior patterns associated with cache manipulation attacks

Monitoring Recommendations

• Enable verbose logging for Artifactory caching operations and forward logs to a SIEM for analysis
• Configure alerts for cache operations involving unexpected artifact paths or unusual request sources
• Implement periodic automated scans comparing cached artifacts against their original upstream sources
• Monitor for unusual download patterns from the Artifactory instance that may indicate compromised cached content being served

How to Mitigate CVE-2024-6915

Immediate Actions Required

• Identify all JFrog Artifactory instances in your environment and determine their current versions
• Prioritize upgrading internet-facing Artifactory instances to patched versions immediately
• Review Artifactory access logs for any indicators of exploitation attempts
• Consider temporarily restricting network access to vulnerable instances until patches can be applied

Patch Information

JFrog has released patched versions addressing this vulnerability. Organizations should upgrade to the following versions or later based on their current version branch:

• Version 7.90.6 or later for the 7.90.x branch
• Version 7.84.20 or later for the 7.84.x branch
• Version 7.77.14 or later for the 7.77.x branch
• Version 7.71.23 or later for the 7.71.x branch
• Version 7.68.22 or later for the 7.68.x branch
• Version 7.63.22 or later for the 7.63.x branch
• Version 7.59.23 or later for the 7.59.x branch
• Version 7.55.18 or later for the 7.55.x branch

Refer to the JFrog Security Advisory for detailed upgrade instructions.

Workarounds

• Implement network segmentation to restrict access to Artifactory instances from untrusted networks
• Deploy a Web Application Firewall (WAF) with rules to detect and block potential cache poisoning attempts
• Enable strict access controls requiring authentication for all repository access where feasible
• Implement artifact signing and verification to detect any tampered artifacts in the cache

# Example: Restrict Artifactory access using iptables
# Allow access only from trusted CI/CD networks
iptables -A INPUT -p tcp --dport 8081 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 8081 -j DROP

# Verify current Artifactory version
curl -u admin:password http://localhost:8081/artifactory/api/system/version