Cisco IOS XE CAPWAP Packet heap-based overflow

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.7$5k-$25k0.00

A vulnerability was found in Cisco IOS XE (Router Operating System) (affected version unknown). It has been declared as very critical. Affected by this vulnerability is an unknown code of the component CAPWAP Packet Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-122. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Software for Cisco Catalyst 9000 Family Wireless Controllers could allow an unauthenticated, remote attacker to execute arbitrary code with administrative privileges or cause a denial of service (DoS) condition on an affected device. The vulnerability is due to a logic error that occurs during the validation of CAPWAP packets. An attacker could exploit this vulnerability by sending a crafted CAPWAP packet to an affected device. A successful exploit could allow the attacker to execute arbitrary code with administrative privileges or cause the affected device to crash and reload, resulting in a DoS condition.

The weakness was shared 09/23/2021 as cisco-sa-ewlc-capwap-rce-LYgj8Kf. The advisory is shared at tools.cisco.com. This vulnerability is known as CVE-2021-34770 since 06/15/2021. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 10/01/2021).

Upgrading eliminates this vulnerability.

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CPE 2.3infoedit

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CVSSv3infoedit

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.7

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 10.0
CNA Vector (Cisco Systems, Inc.): 🔒

CVSSv2infoedit

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfoedit

Class: Memory corruption
CWE: CWE-122
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: tools.cisco.com

Timelineinfoedit

06/15/2021 CVE assigned
09/23/2021 +100 days Advisory disclosed
09/23/2021 +0 days VulDB entry created
10/01/2021 +8 days VulDB last update

Sourcesinfoedit

Vendor: https://www.cisco.com/

Advisory: cisco-sa-ewlc-capwap-rce-LYgj8Kf
Status: Confirmed

CVE: CVE-2021-34770 (🔒)
scip Labs: https://www.scip.ch/en/?labs.20150108

Entryinfoedit

Created: 09/23/2021 10:05 AM
Updated: 10/01/2021 01:11 PM
Changes: (1) source_cve_nvd_summary
Complete: 🔍

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