CVE-2019-0703KEV · OVERDUE

Microsoft Windows SMB Information Disclosure Vulnerability

Medium · published April 8, 2019

Patch now

The score understates this — it's already being exploited

CVSS calls it medium at 6.5. It is confirmed in active exploitation. It sits in the 95.4th percentile for exploit probability.

1593
days past CISA
deadline
CVSS v3.1
6.5
EPSS
9%
Percentile
95.4
In the wild
Confirmed
What it is

⚠️ An unexpected request can spill sensitive information from the Windows SMB Server! This information disclosure vulnerability could open the floodgates to valuable data. 🔓 Think of it like a waiter who accidentally spills the entire contents of an order summary when you just asked for the dessert menu — too much info, too readily available! This vulnerability allows an attacker to extract sensitive information from the server, making it easier for them to understand the internal workings of your system. This could lead to further targeted attacks, putting valuable data at risk.

Put simply

Think of it like a waiter who accidentally spills the entire contents of an order summary when you just asked for the dessert menu — too much info, too readily available! The vulnerability arises from improper handling of certain requests, allowing attackers to access potentially sensitive information that should remain confidential.

What to do

This vulnerability allows an attacker to extract sensitive information from the server, making it easier for them to understand the internal workings of your system. This could lead to further targeted attacks, putting valuable data at risk. To address this vulnerability, ensure you're running the latest Windows updates that mitigate this flaw. Regularly audit your SMB configurations and restrict access to only necessary users. Stay vigilant about monitoring unusual server requests. You've got this! With a few updates and careful monitoring, you'll have your defenses strengthened in no time! 🛡️

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.09385 · 95.4th percentile
Published
2019-04-08T23:41Z
KEV added
2022-05-23 · due 2022-06-13
EPSS history
Timeline
  • 23 MAY 00:00Z
    Added to CISA KEV — remediate by Jun 13
    kev
  • 08 APR 23:41Z
    An information disclosure vulnerability exists in the way that the Windows SMB Server handles certain requests, aka 'Windows SMB Information Disclosure…
    cvelistv5