CVE-2022-37660
Description
A flaw was found in hostapd. This vulnerability allows an attacker to subvert future PKEX associations via passive observation and reuse of public key exchange elements.
Statement
This vulnerability marked as important severity rather than moderate because it enables an attacker with prior PKEX bootstrapping knowledge to passively extract the ephemeral public key (X) from a subsequent exchange, effectively bypassing authentication and subverting the DPP onboarding process. Unlike a moderate vulnerability, which typically requires active exploitation or additional preconditions, this attack is low-interaction and stealthy, requiring only passive observation of a legitimate exchange. Furthermore, since PKEX is designed for out-of-band authentication in secure provisioning scenarios, its compromise undermines the integrity of device onboarding, potentially leading to unauthorized network access or man-in-the-middle (MitM) attacks.
Mitigation
Mitigation for this issue is either not available or the currently available options do not 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).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.4 | N/A | 6.5 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | High | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | High | N/A | Low |
| Integrity Impact | High | N/A | Low |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Understanding the Weakness (CWE)
Access Control
Technical Impact: Gain Privileges or Assume Identity
Messages sent with a capture-relay attack allow access to resources which are not otherwise accessible without proper authentication.
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