CVE-2024-45338

What it actually does

An attacker can craft an input to the Parse functions that would be processed non-linearly with respect to its length, resulting in extremely slow parsing. This could cause a denial of service.

Why it matters to the business

Service availability can be disrupted through resource exhaustion, leading to downtime or degraded performance for affected systems until the vulnerable component is updated.

How an attack unfolds

An attacker identifies a network-accessible endpoint that invokes vulnerable Parse functions, submits specially crafted inputs designed to trigger quadratic or worse processing time relative to input length, and repeats the requests to consume CPU or memory resources until the service becomes unresponsive.

How to fix it

Upgrade firefox on Ubuntu 14.04 LTS to version 45.0+build2-0ubuntu0.14.04.1 or later. Apply vendor patches for any other affected packages and test in a staging environment before production deployment.

How to confirm the fix worked

Verify installed package versions match or exceed the fixed releases, run performance benchmarks with known slow inputs to confirm linear processing time, and review change logs for the parsing fixes.

Typical attack path

1. Locate network-accessible services or libraries using the vulnerable Parse functions
2. Craft input that forces non-linear parsing time
3. Transmit the malicious input repeatedly from one or more sources
4. Observe resource exhaustion leading to denial of service

How to detect it

Inspect application and system logs for unusually long processing durations on parse operations, correlate with inbound request patterns showing high volume or large payloads, and review resource utilization metrics for spikes tied to parsing activity.

What your security team should do

• Prioritize patching all instances of the affected firefox package to the stated fixed version
• Implement input validation and rate limiting around parsing endpoints as a defense-in-depth measure
• Monitor CPU and memory utilization on services handling untrusted parse operations
• Review dependency inventories to identify any additional downstream packages using the vulnerable parsing code