CVE-2021-3115
説明
A flaw was found in golang: cmd/go, in which Go can execute arbitrary commands at build time when cgo is in use on Windows OS. On Linux/Unix, only users who have "." listed explicitly in their PATH variable are affected. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
詳細
While OpenShift Container Platform (OCP), Red Hat OpenShift Jaeger (RHOSJ), OpenShift Service Mesh (OSSM) and OpenShift Virtualization all contain RPMs and containers which are compiled with a vulnerable version of Go, the vulnerability is specific to the building of Go code itself. Hence the relevant components have been marked as not affected.
Additionally, only the main RPMs and containers for OCP, RHOSJ, OSSM and OpenShift Virtualization are represented due to the large volume of not affected components.
軽減策
The flaw can be mitigated by making sure "." is not in your PATH environment variable.
CVSS (Common Vulnerability Scoring System) のスコアの詳細
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 スコアの内訳
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| ベーススコア | 7.5 | 7.5 | N/A |
| 攻撃ベクトル | Network | Network | N/A |
| 攻撃の複雑さ | High | High | N/A |
| 必要な権限 | None | None | N/A |
| ユーザー関与レベル | Required | Required | N/A |
| 範囲 | Unchanged | Unchanged | N/A |
| 機密性 | High | High | N/A |
| 完全性への影響 | High | High | N/A |
| 可用性への影響 | High | High | N/A |
ベクトル
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Red Hat CVSS v3 スコアの説明
This is very similar to CVE-2020-28367, and requires user interaction in the form of a go build.
脆弱性の原因 (CWE) の理解
Access Control
Technical Impact: Bypass Protection Mechanism
In some cases, injectable code controls authentication; this may lead to a remote vulnerability.
Access Control
Technical Impact: Gain Privileges or Assume Identity
Injected code can access resources that the attacker is directly prevented from accessing.
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
When a product allows a user's input to contain code syntax, it might be possible for an attacker to craft the code in such a way that it will alter the intended control flow of the product. As a result, code injection can often result in the execution of arbitrary code. Code injection attacks can also lead to loss of data integrity in nearly all cases, since the control-plane data injected is always incidental to data recall or writing.
Non-Repudiation
Technical Impact: Hide Activities
Often the actions performed by injected control code are unlogged.
よくある質問
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