CVE-2023-45287
Description
A flaw was found in the Golang crypto/tls standard library. In previous versions, the package was vulnerable to a Timing Side Channel attack by observing the time it took for RSA-based TLS key exchanges, which was not constant. This flaw allows a malicious user to gather information from the environment.
Statement
The identified flaw in the Golang crypto/tls library, is assessed as a moderate severity issue rather than important due to several mitigating factors. Although the vulnerability exposes a Timing Side Channel, potentially allowing information retrieval through RSA-based TLS key exchanges, its exploitation demands significant access and expertise. Additionally, while earlier versions implemented RSA blinding to counter timing attacks, the removal of PKCS#1 padding may still leak timing data. However, the practicality of exploiting this flaw is limited, and the transition to a fully constant time RSA implementation in Go 1.20 significantly bolsters security, reducing the risk posed by timing side channels.
Mitigation
No current mitigation is available for this vulnerability.
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 | 7.5 | 7.5 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | High | High | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Understanding the Weakness (CWE)
Confidentiality,Access Control
Technical Impact: Read Application Data; Bypass Protection Mechanism
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