CVE-2018-0158KEV · OVERDUECWE-20

Cisco IOS and XE Software Internet Key Exchange Memory Leak Vulnerability

High · published March 28, 2018

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 8.6. It is confirmed in active exploitation. It sits in the 94.3th percentile for exploit probability.

1680
days past CISA
deadline
CVSS v3.1
8.6
EPSS
7%
Percentile
94.3
In the wild
Confirmed
What it is

🚨 A crafty attacker can exploit a memory leak in Cisco's IKEv2 module just by sending specially crafted packets! ⚡ Think of it as a waiter at a restaurant who keeps bringing out the same dish over and over, causing the kitchen to run out of space and grind to a halt—eventually, they have to close! This vulnerability could leave your Cisco device continuously consuming memory, ultimately leading to a complete shutdown. Imagine a network outage that brings your operations to a standstill—absolutely devastating for any organization relying on smooth connectivity!

Put simply

Think of it as a waiter at a restaurant who keeps bringing out the same dish over and over, causing the kitchen to run out of space and grind to a halt—eventually, they have to close! The vulnerability arises from incorrect processing of certain IKEv2 packets in Cisco IOS and IOS XE software, allowing unauthenticated remote attackers to trigger memory leaks and force the device to reload.

What to do

This vulnerability could leave your Cisco device continuously consuming memory, ultimately leading to a complete shutdown. Imagine a network outage that brings your operations to a standstill—absolutely devastating for any organization relying on smooth connectivity! To safeguard your systems, immediately upgrade affected devices to the latest Cisco IOS versions recommended in the security advisory. Additionally, implement strict network monitoring to detect and drop malicious IKEv2 packets before they can cause trouble. You've got this! With a quick patch, your network will be back on track and secure in no time. 🛡️

The record
Technical detail
CVSS v3.1
8.6 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.07190 · 94.3th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2018-03-28T22:00Z
KEV added
2022-03-03 · due 2022-03-17
EPSS history
Timeline
  • 03 MAR 00:00Z
    Added to CISA KEV — remediate by Mar 17
    kev
  • 28 MAR 22:00Z
    A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote…
    cvelistv5