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CVE-2020-15157— containerd can be coerced into leaking credentials during image pull

Quick assessment

Affected
containerd containerd
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

containerd是美国阿帕奇（Apache）软件基金会的一个容器守护进程。该进程根据 RunC OCI 规范负责控制宿主机上容器的完整周期。 containerd (an industry-standard container runtime) 1.2.14之前版本存在安全漏洞，该漏洞源于存在一个凭据泄漏漏洞，如果URL所在的服务器显示HTTP 401状态码以及注册特定的状态码，默认的containerd解析器将提供其身份验证凭据。

CVSS 6.1 · Medium EPSS 2.30% · P83
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I. Basic Information for CVE-2020-15157

Vulnerability Information
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Vulnerability Title
containerd can be coerced into leaking credentials during image pull
Source: CVE Program / CVE List V5
Vulnerability Description
In containerd (an industry-standard container runtime) before version 1.2.14 there is a credential leaking vulnerability. If a container image manifest in the OCI Image format or Docker Image V2 Schema 2 format includes a URL for the location of a specific image layer (otherwise known as a “foreign layer”), the default containerd resolver will follow that URL to attempt to download it. In v1.2.x but not 1.3.0 or later, the default containerd resolver will provide its authentication credentials if the server where the URL is located presents an HTTP 401 status code along with registry-specific HTTP headers. If an attacker publishes a public image with a manifest that directs one of the layers to be fetched from a web server they control and they trick a user or system into pulling the image, they can obtain the credentials used for pulling that image. In some cases, this may be the user's username and password for the registry. In other cases, this may be the credentials attached to the cloud virtual instance which can grant access to other cloud resources in the account. The default containerd resolver is used by the cri-containerd plugin (which can be used by Kubernetes), the ctr development tool, and other client programs that have explicitly linked against it. This vulnerability has been fixed in containerd 1.2.14. containerd 1.3 and later are not affected. If you are using containerd 1.3 or later, you are not affected. If you are using cri-containerd in the 1.2 series or prior, you should ensure you only pull images from trusted sources. Other container runtimes built on top of containerd but not using the default resolver (such as Docker) are not affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的凭证保护机制
Source: CVE Program / CVE List V5
Vulnerability Title
containerd 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
containerd是美国阿帕奇（Apache）软件基金会的一个容器守护进程。该进程根据 RunC OCI 规范负责控制宿主机上容器的完整周期。 containerd (an industry-standard container runtime) 1.2.14之前版本存在安全漏洞，该漏洞源于存在一个凭据泄漏漏洞，如果URL所在的服务器显示HTTP 401状态码以及注册特定的状态码，默认的containerd解析器将提供其身份验证凭据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
containerd containerd < 1.2.14 -

II. Public POCs for CVE-2020-15157

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III. Intelligence Information for CVE-2020-15157

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Vendor Advisories for CVE-2020-15157 (4)

Other References for CVE-2020-15157 (1)

IV. Related Vulnerabilities

Same product: containerd
Same vendor: containerd
Same weakness: CWE-522

V. Comments for CVE-2020-15157

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