问题所在
当请求取消导致许多流快速重置时,HTTP/2 协议允许消耗过多的服务器资源。攻击者可利用此漏洞引发拒绝服务。
影响范围
此问题影响 1.9.5 到 1.25.2 版本的 nginx。
应对措施
请按照厂商说明实施缓解措施,或遵循适用的云指南。如果无法实施缓解措施,请停止使用该产品。
原始描述
The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.
已知被利用(CISA KEV)
- 加入 KEV 日期
- 2023-10-10
- 修复期限(美国联邦机构)
- 2023-10-31
- 用于勒索软件
- Unknown
- 要求采取的措施
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
受影响的软件
详情
- 发布日期
- 2023-10-10
- 最后修改
- 2026-08-11
- CVSS 向量
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- CWE
- CWE-400
- EPSS(30 天内被利用概率)
- 100.00% (百分位 100)
参考资料
- cve.org/CVE-2023-44487
- nvd.nist.gov/vuln/detail/CVE-2023-44487
- www.openwall.com/lists/oss-security/2023/10/10/6
- www.openwall.com/lists/oss-security/2023/10/10/7
- www.openwall.com/lists/oss-security/2023/10/13/4
- www.openwall.com/lists/oss-security/2023/10/13/9
- www.openwall.com/lists/oss-security/2023/10/18/4
- www.openwall.com/lists/oss-security/2023/10/18/8
- www.openwall.com/lists/oss-security/2023/10/19/6
- www.openwall.com/lists/oss-security/2023/10/20/8
- access.redhat.com/security/cve/cve-2023-44487
- arstechnica.com/security/2023/10/how-ddosers-used-the-http-2-protocol-to-deliver-attacks-o...
- aws.amazon.com/security/security-bulletins/AWS-2023-011/
- blog.cloudflare.com/technical-breakdown-http2-rapid-reset-ddos-attack/
本产品使用 NVD API 的数据,但未获得 NVD 的认可或认证。CVE® 是 The MITRE Corporation 的注册商标;CVE 记录依据 CVE Program 使用条款使用。