CVE-2023-24023
Description
A flaw was found in Bluetooth BR/EDR devices with Secure Simple Pairing and Secure Connections pairing in Bluetooth Core Specification 4.2 through 5.4. This issue may allow certain man-in-the-middle attacks that force a short key length and might lead to discovery of the encryption key and live injection, aka BLUFFS.
Statement
The vulnerability identified as CVE-2023-24023, dubbed "Bluetooth Forward and Future Secrecy Attacks and Defenses (BLUFFS)," is categorized as having moderate severity due to several factors. While it does allow for potential Man-in-The-Middle (MITM) attacks between paired Bluetooth BR/EDR devices, its impact is somewhat limited by certain conditions. Firstly, successful exploitation requires the attacker to be within wireless range of the vulnerable devices during the encryption procedure initiation. Additionally, the attacker's ability to force a reduction in encryption key length may not guarantee real-time brute-forcing of the key, particularly if it exceeds 7 octets.
Mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.8 | 6.8 | 6.4 |
| Attack Vector | Adjacent Network | Adjacent Network | Adjacent Network |
| Attack Complexity | High | High | High |
| Privileges Required | None | None | None |
| User Interaction | None | None | Required |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | High | High | High |
| Integrity Impact | High | High | High |
| Availability Impact | None | None | None |
Vector
Red Hat: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
cve.org: CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Understanding the Weakness (CWE)
Confidentiality,Integrity,Access Control
Technical Impact: Read Application Data; Modify Application Data; Gain Privileges or Assume Identity
An attacker could pose as one of the entities and read or possibly modify the communication.
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