Covert Channel Vulnerability in QUIC Protocol Affecting RFC 9000
CVE-2023-50923

4.3MEDIUM

Key Information:

Vendor

IETF

Status
QUIC Protocol
Vendor
CVE Published:
21 February 2024

What is CVE-2023-50923?

The QUIC protocol, as detailed in RFC 9000, contains a flaw related to the Latency Spin Bit that could allow remote attackers to exploit this vulnerability. Specifically, when the Latency Spin Bit feature is disabled, the lack of strict constraints on its bit value can enable the construction of covert channels. This loophole could potentially facilitate the unauthorized transmission of data concealed within normal network traffic, raising significant concerns for the security of online communication.

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References

https://www.rfc-editor.org/rfc/rfc9000.html
https://ieeexplore.ieee.org/document/10427406
https://arrow.tudublin.ie/nsdcon/2/

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

JSON
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