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CVE-2023-36673

Published: Aug 9, 2023Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-319
NVD MITRE
7.3CVSSHIGH
EPSS Score
0.6%
Top 54.9%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

Description

An issue was discovered in Avira Phantom VPN through 2.23.1 for macOS. The VPN client insecurely configures the operating system such that all IP traffic to the VPN server's IP address is sent in plaintext outside the VPN tunnel, even if this traffic is not generated by the VPN client, while simultaneously using plaintext DNS to look up the VPN server's IP address. This allows an adversary to trick the victim into sending traffic to arbitrary IP addresses in plaintext outside the VPN tunnel. NOTE: the tunnelcrack.mathyvanhoef.com website uses this CVE ID to refer more generally to "ServerIP attack, combined with DNS spoofing, that can leak traffic to an arbitrary IP address" rather than to only Avira Phantom VPN.

CVSS Vector Breakdown

AV:AAC:LPR:NUI:RS:UC:HI:HA:N
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-319

Affected Products

n/an/a
phantom vpnavira
On-prem
Security Products / endpoint-av-edr
AnyConnect Secure Mobility ClientCisco Systems Inc.
On-premDesktop App
Networking Infrastructure
Cisco Secure ClientCisco Systems Inc.
On-prem
Networking Infrastructure / router-switch
Avira Phantom VPNAvira Operations GmBH & Co. KG
On-prem
Security Products / endpoint-av-edr
aviracommercialDESecurity Productsaka avira, antivir
cisco systems inc.commercialUSNetworking Infrastructureaka cisco systems, cisco
avira operations gmbh & co. kgcommercialDESecurity Productsaka avira operations gmbh

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

2 techniques
Collection
Credential Access
View detailed technique mapping

References

https://www.avira.com/en/free-vpn
avira.com
https://tunnelcrack.mathyvanhoef.com/details.html
tunnelcrack.mathyvanhoef.com
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0015
psirt.global.sonicwall.com
and 2 more references View all →

Timeline

Published
Aug 9, 2023
Last Updated
Nov 21, 2024

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