Cisco ASA/Firepower Threat Defense Software SSL VPN improper authentication
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
4.5 | $0-$5k | 0.00 |
A vulnerability, which was classified as critical, has been found in Cisco ASA and Firepower Threat Defense Software (Firewall Software) (affected version not known). This issue affects some unknown functionality of the component SSL VPN. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is integrity. The summary by CVE is:
A vulnerability in the remote access SSL VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to bypass a configured multiple certificate authentication policy and connect using only a valid username and password. This vulnerability is due to improper error handling during remote access VPN authentication. An attacker could exploit this vulnerability by sending crafted requests during remote access VPN session establishment. A successful exploit could allow the attacker to bypass the configured multiple certificate authentication policy while retaining the privileges and permissions associated with the original connection profile.
The weakness was presented 11/01/2023 as cisco-sa-asaftd-multi-cert-dzA3h5PT. The advisory is shared at sec.cloudapps.cisco.com. The identification of this vulnerability is CVE-2023-20247 since 10/27/2022. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/29/2023).
Upgrading eliminates this vulnerability.
See VDB-112635, VDB-142839, VDB-156778 and VDB-158712 for similar entries.
Product
Type
Vendor
Name
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔒VulDB CVSS-BT Score: 🔒
VulDB Vector: 🔒
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 4.5VulDB Meta Temp Score: 4.5
VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍
NVD Base Score: 4.3
NVD Vector: 🔒
CNA Base Score: 5.0
CNA Vector (Cisco Systems, Inc.): 🔒
CVSSv2
AV | AC | Au | C | I | A |
---|---|---|---|---|---|
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
---|---|---|---|---|---|
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: Improper authenticationCWE: CWE-287
CAPEC: 🔒
ATT&CK: 🔒
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 Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔒
Timeline
10/27/2022 CVE reserved11/01/2023 Advisory disclosed
11/01/2023 VulDB entry created
11/29/2023 VulDB entry last update
Sources
Vendor: cisco.comAdvisory: cisco-sa-asaftd-multi-cert-dzA3h5PT
Status: Confirmed
CVE: CVE-2023-20247 (🔒)
See also: 🔒
Entry
Created: 11/01/2023 19:20Updated: 11/29/2023 16:36
Changes: 11/01/2023 19:20 (50), 11/29/2023 16:36 (11)
Complete: 🔍
Cache ID: 3:5F5:103
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