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CVE-2023-28841— Moby 安全漏洞

一分钟漏洞结论

影响对象
moby moby
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。

Moby是一个开源项目，旨在推动软件的容器化，并帮助生态系统使容器技术主流化。 Moby 1.12版本及之后版本存在安全漏洞。攻击者利用该漏洞导致意外的秘密或用户数据泄露。

CVSS 6.8 · Medium EPSS 0.69% · P51
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一、 漏洞 CVE-2023-28841 基础信息

漏洞信息
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Vulnerability Title
moby/moby's dockerd daemon encrypted overlay network traffic may be unencrypted
来源: CVE Program / CVE List V5
Vulnerability Description
Moby is an open source container framework developed by Docker Inc. that is distributed as Docker, Mirantis Container Runtime, and various other downstream projects/products. The Moby daemon component (`dockerd`), which is developed as moby/moby is commonly referred to as *Docker*. Swarm Mode, which is compiled in and delivered by default in `dockerd` and is thus present in most major Moby downstreams, is a simple, built-in container orchestrator that is implemented through a combination of SwarmKit and supporting network code. The `overlay` network driver is a core feature of Swarm Mode, providing isolated virtual LANs that allow communication between containers and services across the cluster. This driver is an implementation/user of VXLAN, which encapsulates link-layer (Ethernet) frames in UDP datagrams that tag the frame with the VXLAN metadata, including a VXLAN Network ID (VNI) that identifies the originating overlay network. In addition, the overlay network driver supports an optional, off-by-default encrypted mode, which is especially useful when VXLAN packets traverses an untrusted network between nodes. Encrypted overlay networks function by encapsulating the VXLAN datagrams through the use of the IPsec Encapsulating Security Payload protocol in Transport mode. By deploying IPSec encapsulation, encrypted overlay networks gain the additional properties of source authentication through cryptographic proof, data integrity through check-summing, and confidentiality through encryption. When setting an endpoint up on an encrypted overlay network, Moby installs three iptables (Linux kernel firewall) rules that enforce both incoming and outgoing IPSec. These rules rely on the `u32` iptables extension provided by the `xt_u32` kernel module to directly filter on a VXLAN packet's VNI field, so that IPSec guarantees can be enforced on encrypted overlay networks without interfering with other overlay networks or other users of VXLAN. An iptables rule designates outgoing VXLAN datagrams with a VNI that corresponds to an encrypted overlay network for IPsec encapsulation. Encrypted overlay networks on affected platforms silently transmit unencrypted data. As a result, `overlay` networks may appear to be functional, passing traffic as expected, but without any of the expected confidentiality or data integrity guarantees. It is possible for an attacker sitting in a trusted position on the network to read all of the application traffic that is moving across the overlay network, resulting in unexpected secrets or user data disclosure. Thus, because many database protocols, internal APIs, etc. are not protected by a second layer of encryption, a user may use Swarm encrypted overlay networks to provide confidentiality, which due to this vulnerability this is no longer guaranteed. Patches are available in Moby releases 23.0.3, and 20.10.24. As Mirantis Container Runtime's 20.10 releases are numbered differently, users of that platform should update to 20.10.16. Some workarounds are available. Close the VXLAN port (by default, UDP port 4789) to outgoing traffic at the Internet boundary in order to prevent unintentionally leaking unencrypted traffic over the Internet, and/or ensure that the `xt_u32` kernel module is available on all nodes of the Swarm cluster.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
敏感数据加密缺失
来源: CVE Program / CVE List V5
Vulnerability Title
Moby 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Moby是一个开源项目，旨在推动软件的容器化，并帮助生态系统使容器技术主流化。 Moby 1.12版本及之后版本存在安全漏洞。攻击者利用该漏洞导致意外的秘密或用户数据泄露。
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
moby moby >= 1.12.0, < 20.10.24 -

二、漏洞 CVE-2023-28841 的公开POC

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三、漏洞 CVE-2023-28841 的情报信息

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CVE-2023-28841 补丁与修复 (1)

CVE-2023-28841 厂商安全公告 (5)

CVE-2023-28841 邮件列表归档 (3)

CVE-2023-28841 其他参考 (2)

同批安全公告 · moby · 2023-04-04 · 共 3 条

CVE-2023-28840 7.5 HIGH Moby 安全漏洞
CVE-2023-28842 6.8 MEDIUM Moby 安全漏洞

IV. Related Vulnerabilities

Same product: moby
Same vendor: moby
Same weakness: CWE-311

V. Comments for CVE-2023-28841

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