CVE-2020-6923

What it actually does

Memory buffer overflow condition allowing high availability impact through application crashes when processing crafted input over adjacent network.

Why it matters to the business

Potential service disruption on affected Linux systems running the vulnerable software, requiring urgent patching on legacy Ubuntu 14.04 deployments despite low exploit probability.

How an attack unfolds

An attacker on the same network crafts and delivers malicious data to trigger the buffer overflow in the HPLIP component, resulting in denial of service without requiring authentication or user interaction beyond initial exposure.

How to fix it

Upgrade chromium-browser on Ubuntu 14.04 LTS to version 53.0.2785.143-0ubuntu0.14.04.1.1142 or later; apply equivalent patches for HPLIP where the buffer overflow originates.

How to confirm the fix worked

Confirm installed package versions meet or exceed the fixed releases and perform functional testing to ensure buffer handling no longer triggers crashes.

Typical attack path

1. Scan for exposed instances of the vulnerable HPLIP software on the local network
2. Craft a malicious payload designed to overflow the memory buffer
3. Transmit the payload via adjacent network vectors
4. Trigger the overflow to cause application crash or further impact

How to detect it

Review system and application logs for unexpected crashes or memory-related errors around HPLIP processes; correlate with network traffic from untrusted adjacent hosts.

What your security team should do

• Apply the listed fixed versions immediately on all affected Ubuntu 14.04 systems
• Restrict network exposure of printing services until patched
• Monitor EPSS trends and re-evaluate if exploit maturity increases