CVE-2018-21018

Mastodon before 2.6.3 mishandles timeouts of incompletely established sessions

published September 22, 2019

CVSS
—
EPSS
3%
Percentile
85.0
In the wild
Unconfirmed
What it is

⚠️ A timeout in session handling could leave your users hanging! Mastodon versions before 2.6.3 mishandle incomplete sessions, which is like a restaurant leaving diners at the door instead of seating them properly. 🍽️ Think of it like a hotel that accepts guests but forgets to give them room keys. They’re left in the lobby, wondering if they’re checked in or just lost! This mishandling could result in users experiencing prolonged sessions that never fully establish or time out, potentially leading to confusion or unauthorized access. User frustration may grow, and in the worst-case scenario, it could allow for unexpected behaviors in user accounts that could compromise their experience.

Put simply

Think of it like a hotel that accepts guests but forgets to give them room keys. They’re left in the lobby, wondering if they’re checked in or just lost! The flaw in Mastodon arises from improper timeout management of incompletely established sessions, which means that the system doesn't properly close these sessions, leaving them dangling and vulnerable to unwanted access.

What to do

This mishandling could result in users experiencing prolonged sessions that never fully establish or time out, potentially leading to confusion or unauthorized access. User frustration may grow, and in the worst-case scenario, it could allow for unexpected behaviors in user accounts that could compromise their experience. Update Mastodon to version 2.6.3 or later immediately to fix this issue. Regularly review your session management practices to ensure timeouts are enforced correctly. Additionally, educate your users about safe session practices in your platform. You’ve got this! Secure your Mastodon instance and keep your users happy and safe! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.02561 · 85.0th percentile
Published
2019-09-22T14:22Z
EPSS history
Timeline
  • 22 SEP 14:22Z
    Mastodon before 2.6.3 mishandles timeouts of incompletely established sessions
    cvelistv5