VDB-190163 · CVE-2021-34704 · GCVE-0-2021-34704

Cisco ASA/Firepower Threat Defense Web Services Interface out-of-bounds write

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.8	$5k-$25k	0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Cisco ASA and Firepower Threat Defense. The affected element is an unknown function of the component Web Services Interface. The manipulation leads to out-of-bounds write. This vulnerability is listed as CVE-2021-34704. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Cisco ASA and Firepower Threat Defense (Firewall Software) (affected version unknown). This issue affects an unknown functionality of the component Web Services Interface. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is availability.

The weakness was presented 01/11/2022 as cisco-sa-asafdt-webvpn-dos-KSqJAKPA. It is possible to read the advisory at tools.cisco.com. The identification of this vulnerability is CVE-2021-34704 since 06/15/2021. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/28/2023).

Upgrading eliminates this vulnerability.

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Productinfo

Type

Firewall Software

Vendor

Cisco

Name

License

commercial

Website

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

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.8

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 8.6
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/15/2021 🔍
01/11/2022 +210 days 🔍
01/11/2022 +0 days 🔍
07/28/2023 +563 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-asafdt-webvpn-dos-KSqJAKPA
Status: Confirmed

CVE: CVE-2021-34704 (🔍)
GCVE (CVE): GCVE-0-2021-34704
GCVE (VulDB): GCVE-100-190163

Entryinfo

Created: 01/11/2022 22:59
Updated: 07/28/2023 15:08
Changes: 01/11/2022 22:59 (49), 01/15/2022 07:43 (1), 07/28/2023 15:08 (2)
Complete: 🔍
Cache ID: 216::103