CVE-2024-48896

What it actually does

The vulnerability allows users with the "send message" capability to view other users' names that they may not otherwise have access to via an error message in Messaging. Note: The name returned follows the full name format configured on the site.

Why it matters to the business

Low-severity privacy exposure of user identities in educational platforms with no ransomware usage or active exploitation campaigns observed; minimal operational disruption but potential compliance concerns around user data visibility.

How an attack unfolds

An attacker with send message permissions interacts with the messaging system in a way that triggers an error condition, causing the system to return full names of other users in the error output.

How to fix it

Apply the available fixed versions for affected packages: libarchive (Ubuntu:14.04:LTS) fixed in 3.1.2-7ubuntu2.3 and libarchive (Ubuntu:16.04:LTS) fixed in 3.1.2-11ubuntu0.16.04.2; monitor for platform-specific patches addressing the messaging error disclosure.

How to confirm the fix worked

Review error message outputs in the messaging feature after applying updates to confirm no unauthorized names are disclosed; test with limited-permission accounts to verify access controls on user names.

Typical attack path

1. Acquire the send message capability on the platform
2. Perform messaging actions designed to provoke an error response
3. Inspect the resulting error message for unauthorized user names

How to detect it

Examine application logs for messaging error events that include unexpected user name disclosures; review access logs for unusual messaging activity from accounts with send message rights.

What your security team should do

• Prioritize patching affected Ubuntu libarchive packages to the listed fixed versions
• Audit messaging permission assignments to minimize exposure
• Monitor EPSS trend for any increase indicating rising exploit interest