CVE-2024-7409
説明
A flaw was found in the QEMU NBD Server. This vulnerability allows a denial of service (DoS) attack via improper synchronization during socket closure when a client keeps a socket open as the server is taken offline.
詳細
This issue is classified as Moderate severity rather than Important because it primarily results in a denial of service condition rather than a more crucial impact such as data corruption, unauthorized access, or system compromise. The NULL pointer dereference occurs under specific conditions where the NBD server is stopped before nbd_blockdev_client_closed is called, which leads to a segmentation fault and crash of the QEMU process. However, this scenario is mitigated by the fact that it requires a particular sequence of events involving client connection handling and server shutdown. Additionally, proper network segmentation and the use of secure client connections can further reduce the likelihood of this issue being exploited.
軽減策
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.
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 | N/A | 7.5 |
| 攻撃ベクトル | Network | N/A | Network |
| 攻撃の複雑さ | Low | N/A | Low |
| 必要な権限 | None | N/A | None |
| ユーザー関与レベル | None | N/A | None |
| 範囲 | Unchanged | N/A | Unchanged |
| 機密性 | None | N/A | None |
| 完全性への影響 | None | N/A | None |
| 可用性への影響 | High | N/A | High |
ベクトル
Red Hat: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
脆弱性の原因 (CWE) の理解
Integrity,Confidentiality,Other
Technical Impact: Modify Application Data; Read Application Data; Alter Execution Logic
よくある質問
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