Skip to main content

CVE-2016-6366

Cisco — Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow Vulnerability

Cisco · CWE-120 — Classic buffer overflow · in CISA KEV since 2022-05-24

KEV since 2022 · listed over a yearCISA KEVActively Exploited
82

EVRS 82 of 100 Urgent

Patch This Cycle

Rank 544 of 2,960 tracked

Download PDF

Why it scores 82

Evidence available: 6 of 7 signals

Listed in the CISA KEV catalog, and an EPSS probability of 0.876.

  • CISA KEVApplied
  • RansomwareDid not apply
  • Vendor exploitationDid not apply
  • EPSSApplied
  • Microsoft Exploitability IndexNot applicable
  • Pre-patch disclosureNo data
  • KEV recencyDid not apply
  • CVSSApplied

The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data

Fix

Patch or fixed version identified

CISA required action

Fixed in

adaptive security appliance software: update to 9.0.4.40 or later | adaptive security appliance software: update to 9.1.7\(9\) or later | adaptive security appliance software: update to 9.2.4\(14\) or later | adaptive security appliance software: update to 9.3.3\(10\) or later | adaptive security appliance software: update to 9.4.3\(8\) or later | adaptive security appliance software: update to a version newer than 9.5\(3\)

Affected versions

  • pix firewall software
  • adaptive security appliance software>= 7.2.1 < 9.0.4.40>= 9.1.1 < 9.1.7\(9\)>= 9.2.0 < 9.2.4\(14\)>= 9.3.0 < 9.3.3\(10\)>= 9.4.0.115 < 9.4.3\(8\)>= 9.5.0 <= 9.5\(3\)>= 9.6.0 < 9.6.1\(11\)
  • asa 1000v cloud firewall software8.7.18.7.1.1
  • pix firewall 501
  • pix firewall 506
  • pix firewall 506e
  • pix firewall 515
  • pix firewall 515e

+37 more affected products; see the full list at NVD.

Remediation

Apply updates per vendor instructions.

Fixed versions from NVD.

Evidence

Each value with its source
MeasureValueSource
CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. 8.8 NVD
FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. 0.876 (99.76th pctl) FIRST EPSS
Actively exploitedWhether a source of record has confirmed attacks using it in the wild. Confirmed CISA KEV
Ransomware campaign useWhether CISA has seen ransomware operators use it. Unknown or none CISA KEV
CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. 2022-06-14 · KEV since 2022 · listed over a year CISA KEV
Public exploit moduleA module existing is not the same as active exploitation. Public module exists Metasploit
EUVD cross-referenceENISA's record: CVSS 8.8 (v3.1), assigned by cisco. Listed ENISA EUVD

Description

NVD

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 9300 ASA Security Module, PIX, and FWSM devices allows remote authenticated users to execute arbitrary code via crafted IPv4 SNMP packets, aka Bug ID CSCva92151 or EXTRABACON.

What CISA says to do

Public module

Metasploit lists a public normal-rank module for this CVE: Cisco ASA Authentication Bypass (EXTRABACON) (admin/networking/cisco_asa_extrabacon). A module existing is not the same as active exploitation; see metasploit.com.