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CVE-2020-26278— Weaveworks Weave Net 安全漏洞

一分钟漏洞结论

影响对象
weaveworks weave
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

Weaveworks Weave Net是英国Weaveworks公司的一款云原生网络工具包。 Weave Net 存在安全漏洞，攻击者可利用该漏洞接管集群中的任何主机。

CVSS 5.8 · Medium EPSS 0.74% · P52
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一、 漏洞 CVE-2020-26278 基础信息

漏洞信息
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Vulnerability Title
Weave Net Pods running in host PID namespace can be used to escalate other Kubernetes vulnerabilities
来源: CVE Program / CVE List V5
Vulnerability Description
Weave Net is open source software which creates a virtual network that connects Docker containers across multiple hosts and enables their automatic discovery. Weave Net before version 2.8.0 has a vulnerability in which can allow an attacker to take over any host in the cluster. Weave Net is supplied with a manifest that runs pods on every node in a Kubernetes cluster, which are responsible for managing network connections for all other pods in the cluster. This requires a lot of power over the host, and the manifest sets `privileged: true`, which gives it that power. It also set `hostPID: true`, which gave it the ability to access all other processes on the host, and write anywhere in the root filesystem of the host. This setting was not necessary, and is being removed. You are only vulnerable if you have an additional vulnerability (e.g. a bug in Kubernetes) or misconfiguration that allows an attacker to run code inside the Weave Net pod, No such bug is known at the time of release, and there are no known instances of this being exploited. Weave Net 2.8.0 removes the hostPID setting and moves CNI plugin install to an init container. Users who do not update to 2.8.0 can edit the hostPID line in their existing DaemonSet manifest to say false instead of true, arrange some other way to install CNI plugins (e.g. Ansible) and remove those mounts from the DaemonSet manifest.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
带着不必要的权限执行
来源: CVE Program / CVE List V5
Vulnerability Title
Weaveworks Weave Net 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Weaveworks Weave Net是英国Weaveworks公司的一款云原生网络工具包。 Weave Net 存在安全漏洞，攻击者可利用该漏洞接管集群中的任何主机。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商 产品 影响版本 CPE 订阅
weaveworks weave < 2.8.0 -

二、漏洞 CVE-2020-26278 的公开POC

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三、漏洞 CVE-2020-26278 的情报信息

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CVE-2020-26278 补丁与修复 (2)

CVE-2020-26278 厂商安全公告 (1)

CVE-2020-26278 其他参考 (1)

IV. Related Vulnerabilities

Same product: weave
Same vendor: weaveworks
Same weakness: CWE-250

V. Comments for CVE-2020-26278

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