CVE-2016-6366KEV · OVERDUE

Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow Vulnerability

High · published August 18, 2016

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 8.8. It is confirmed in active exploitation. It sits in the 99.8th percentile for exploit probability.

1591
days past CISA
deadline
CVSS v3.1
8.8
EPSS
88%
Percentile
99.8
In the wild
Confirmed
What it is

🚨 A crafty buffer overflow in Cisco's Adaptive Security Appliance could let remote authenticated users run arbitrary code just by sending specially crafted SNMP packets. ⚡ Think of it like a delivery driver sneaking in a package with a hidden explosive — if the driver is trusted, no one checks the contents, and boom! You've got chaos. This vulnerability lets attackers exploit trusted user status to unleash their payload. The consequences are absolutely devastating! An attacker could execute any code they desire, potentially taking full control of crucial security devices. This means they could siphon sensitive data, disrupt operations, or even manipulate network traffic—all of which could lead to catastrophic breaches.

Put simply

Think of it like a delivery driver sneaking in a package with a hidden explosive — if the driver is trusted, no one checks the contents, and boom! You've got chaos. This vulnerability lets attackers exploit trusted user status to unleash their payload. This vulnerability arises from a buffer overflow in multiple versions of Cisco ASA software, allowing remote authenticated users to manipulate memory through crafted IPv4 SNMP packets, bypassing standard security measures.

What to do

The consequences are absolutely devastating! An attacker could execute any code they desire, potentially taking full control of crucial security devices. This means they could siphon sensitive data, disrupt operations, or even manipulate network traffic—all of which could lead to catastrophic breaches. To protect your systems, ensure you upgrade to the patched version of the ASA software as recommended by Cisco. Additionally, review network access controls to limit SNMP access only to trusted users and devices. Regularly audit your network for any unauthorized changes to configurations. You've got this! Secure your systems now, and you'll be one step closer to being a security hero! 🛡️

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.87565 · 99.8th percentile
Published
2016-08-18T18:00Z
KEV added
2022-05-24 · due 2022-06-14
EPSS history
Timeline
  • 24 MAY 00:00Z
    Added to CISA KEV — remediate by Jun 14
    kev
  • 18 AUG 18:00Z
    Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on ASA 5500, ASA 5500-X, ASA Services Module, ASA 1000V, ASAv, Firepower…
    cvelistv5