CVE-2021-21272— zip slip in ORAS
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I. Basic Information for CVE-2021-21272
Vulnerability Information
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Vulnerability Title
zip slip in ORAS
Source: CVE Program / CVE List V5
Vulnerability Description
ORAS is open source software which enables a way to push OCI Artifacts to OCI Conformant registries. ORAS is both a CLI for initial testing and a Go Module. In ORAS from version 0.4.0 and before version 0.9.0, there is a "zip-slip" vulnerability. The directory support feature allows the downloaded gzipped tarballs to be automatically extracted to the user-specified directory where the tarball can have symbolic links and hard links. A well-crafted tarball or tarballs allow malicious artifact providers linking, writing, or overwriting specific files on the host filesystem outside of the user-specified directory unexpectedly with the same permissions as the user who runs `oras pull`. Users of the affected versions are impacted if they are `oras` CLI users who runs `oras pull`, or if they are Go programs, which invoke `github.com/deislabs/oras/pkg/content.FileStore`. The problem has been fixed in version 0.9.0. For `oras` CLI users, there is no workarounds other than pulling from a trusted artifact provider. For `oras` package users, the workaround is to not use `github.com/deislabs/oras/pkg/content.FileStore`, and use other content stores instead, or pull from a trusted artifact provider.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Deislabs Oras 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Deislabs Oras是Deislabs团队的一个基于Go语言的用于将OCI包推送到注册端的软件。 Deislabs Oras 存在后置链接漏洞，攻击者可利用该漏洞写入或覆盖用户之外的主机文件系统上的特定文件。
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
II. Public POCs for CVE-2021-21272
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Patches & Fixes for CVE-2021-21272 (1)
Vendor Advisories for CVE-2021-21272 (1)
- https://github.com/deislabs/oras/security/advisories/GHSA-g5v4-5x39-vwhxx_refsource_CONFIRM
Other References for CVE-2021-21272 (2)
- https://pkg.go.dev/github.com/deislabs/oras/pkg/orasx_refsource_MISC
- https://github.com/deislabs/oras/releases/tag/v0.9.0x_refsource_MISC
IV. Related Vulnerabilities
Same weakness: CWE-22
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StoreEngine <= 2.1.1 - Authenticated (Vendor+) Arbitrary Fil - CVE-2026-14524
ProSolution WP Client <= 2.0.8 - Unauthenticated Arbitrary F - CVE-2026-74764
Path Traversal in TAR Archive Extraction Allows Arbitrary Fi - CVE-2026-18855
Link Library <= 7.9.4 - Unauthenticated Arbitrary File Delet
V. Comments for CVE-2021-21272
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