CVE-2023-2754

Summary

The Cloudflare WARP client for Windows assigns loopback IPv4 addresses for the DNS Servers, since WARP acts as local DNS server that performs DNS queries in a secure manner, however, if a user is connected to WARP over an IPv6-capable network, te WARP client did not assign loopback IPv6 addresses but Unique Local Addresses, which under certain conditions could point towards unknown devices in the same local network which enables an Attacker to view DNS queries made by the device.

Affected Software

Weaknesses

• CWE-319: CWE-319 Cleartext Transmission of Sensitive Information

Workarounds

Disabling IPv6 support in local devices

ADP Enrichment

CVE Program Container

Additional References

• https://install.appcenter.ms/orgs/cloudflare/apps/1.1.1.1-windows-1/distribution_groups/release
• https://github.com/cloudflare/advisories/security/advisories/GHSA-mv6g-7577-vq4w
• https://developers.cloudflare.com/warp-client/

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: total

References

• https://install.appcenter.ms/orgs/cloudflare/apps/1.1.1.1-windows-1/distribution_groups/release
• https://github.com/cloudflare/advisories/security/advisories/GHSA-mv6g-7577-vq4w
• https://developers.cloudflare.com/warp-client/

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