CVE-2024-29961: Brocade SANnav Information Disclosure Flaw

CVE-2024-29961 Overview

CVE-2024-29961 affects Broadcom Brocade SANnav storage area network management software before versions 2.3.1 and 2.3.0a. The appliance issues unauthenticated outbound ping requests to gridgain.com at regular intervals to check for component updates. An unauthenticated remote attacker who observes or intercepts this traffic can fingerprint the appliance and prepare a supply-chain attack against the embedded GridGain component. The flaw is classified under [CWE-200] Information Exposure. Broadcom published Security Advisory #23246 addressing the issue.

Critical Impact

Unauthenticated network observers can identify vulnerable SANnav appliances through their predictable outbound update checks and stage supply-chain attacks against the GridGain dependency.

Affected Products

• Broadcom Brocade SANnav versions prior to 2.3.1
• Broadcom Brocade SANnav 2.3.0 (fixed in 2.3.0a)
• SANnav management appliances integrating the GridGain component

Discovery Timeline

• 2024-04-19 - CVE-2024-29961 published to NVD
• 2025-02-04 - Last updated in NVD database

Technical Details for CVE-2024-29961

Vulnerability Analysis

Brocade SANnav is a network management application for Fibre Channel storage area networks. The platform embeds GridGain, an in-memory computing component used for clustering and caching. A background service inside SANnav periodically issues ping requests to gridgain.com to determine whether updates are available for the embedded component.

This outbound behavior exposes two security properties to any network observer. First, the predictable traffic pattern identifies a host as a Brocade SANnav appliance. Second, the destination domain reveals the third-party dependency, allowing an attacker to target the supply chain. An attacker positioned between the appliance and the public Internet can also tamper with response traffic to influence update behavior.

Root Cause

The root cause is an insecure design choice in the update-check mechanism. The service initiates unauthenticated outbound connectivity to an external domain without operator consent, mutual authentication, or pinned trust anchors. This violates the principle of least communication and aligns with [CWE-200] information exposure to an unauthorized actor.

Attack Vector

Exploitation requires network adjacency to observe or intercept SANnav outbound traffic. A remote attacker monitoring egress flows, DNS resolutions for gridgain.com, or upstream routing can enumerate SANnav appliances across an environment. The attacker can then chain reconnaissance into a supply-chain attack by manipulating DNS, BGP, or TLS interception paths to deliver crafted responses or influence subsequent component-fetch operations. No authentication, user interaction, or local access is required for the reconnaissance phase.

No verified public proof-of-concept exists. See the Broadcom Security Advisory #23246 for vendor technical details.

Detection Methods for CVE-2024-29961

Indicators of Compromise

• Outbound DNS queries from SANnav management hosts resolving gridgain.com or its subdomains
• ICMP or HTTPS connections originating from SANnav appliances to GridGain-associated IP ranges at regular intervals
• Unexpected modifications to GridGain component files or update manifests on SANnav servers

Detection Strategies

• Inspect egress firewall and proxy logs for periodic connections from SANnav management interfaces to external GridGain infrastructure
• Correlate DNS resolver logs with SANnav host inventories to identify appliances making the update-check requests
• Baseline expected outbound traffic from storage management hosts and alert on connections to unapproved third-party domains

Monitoring Recommendations

• Forward SANnav host network telemetry, DNS logs, and firewall events into a centralized analytics pipeline for cross-source correlation
• Monitor for upstream DNS or routing anomalies affecting gridgain.com resolution from management subnets
• Track SANnav version inventory and flag any host running a release earlier than 2.3.1 or 2.3.0a

How to Mitigate CVE-2024-29961

Immediate Actions Required

• Upgrade Brocade SANnav to version 2.3.1 or apply the 2.3.0a hotfix as documented in the Broadcom advisory
• Restrict SANnav management host egress to an explicit allowlist that excludes gridgain.com until patched
• Audit SANnav appliances for unauthorized changes to the GridGain component and validate file integrity against vendor checksums

Patch Information

Broadcom addressed CVE-2024-29961 in Brocade SANnav v2.3.1 and v2.3.0a. Customers should reference Broadcom Security Advisory #23246 for download locations, upgrade procedures, and verification steps. Apply patches through standard SANnav upgrade tooling and validate version metadata after deployment.

Workarounds

• Block outbound connections from SANnav servers to gridgain.com and related GridGain update endpoints at the perimeter firewall
• Deploy a DNS sinkhole for gridgain.com on networks hosting unpatched SANnav appliances to suppress reconnaissance traffic
• Place SANnav management interfaces on an isolated network segment with strict egress filtering until upgrades are complete

# Example perimeter firewall rule to block SANnav egress to GridGain update endpoint
iptables -A OUTPUT -s <SANNAV_HOST_IP> -d gridgain.com -j DROP
iptables -A OUTPUT -s <SANNAV_HOST_IP> -p icmp -m string --string "gridgain" --algo bm -j DROP