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Vulnerability Details : CVE-2021-21334

In containerd (an industry-standard container runtime) before versions 1.3.10 and 1.4.4, containers launched through containerd's CRI implementation (through Kubernetes, crictl, or any other pod/container client that uses the containerd CRI service) that share the same image may receive incorrect environment variables, including values that are defined for other containers. If the affected containers have different security contexts, this may allow sensitive information to be unintentionally shared. If you are not using containerd's CRI implementation (through one of the mechanisms described above), you are not vulnerable to this issue. If you are not launching multiple containers or Kubernetes pods from the same image which have different environment variables, you are not vulnerable to this issue. If you are not launching multiple containers or Kubernetes pods from the same image in rapid succession, you have reduced likelihood of being vulnerable to this issue This vulnerability has been fixed in containerd 1.3.10 and containerd 1.4.4. Users should update to these versions.
Publish Date : 2021-03-10 Last Update Date : 2021-05-26
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- CVSS Scores & Vulnerability Types

CVSS Score
4.3
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 668

- Products Affected By CVE-2021-21334

# Product Type Vendor Product Version Update Edition Language
1 OS Fedoraproject Fedora 33 * * * Version Details Vulnerabilities
2 OS Fedoraproject Fedora 34 * * * Version Details Vulnerabilities
3 Application Linuxfoundation Containerd * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Fedoraproject Fedora 2
Linuxfoundation Containerd 1

- References For CVE-2021-21334

https://security.gentoo.org/glsa/202105-33
GENTOO GLSA-202105-33
https://lists.fedoraproject.org/archives/list/[email protected]/message/VTXHA5JOWQRCCUZH7ZQBEYN6KZKJEYSD/
FEDORA FEDORA-2021-f049305892
https://github.com/containerd/containerd/releases/tag/v1.4.4
https://lists.fedoraproject.org/archives/list/[email protected]/message/KUE2Z2ZUWBHRU36ZGBD2YSJCYB6ELPXE/
FEDORA FEDORA-2021-470fa24f5b
https://lists.fedoraproject.org/archives/list/[email protected]/message/QIBPKSX5IOWPM3ZPFB3JVLXWDHSZTTWT/
FEDORA FEDORA-2021-10ce8fcbf1
https://github.com/containerd/containerd/commit/05f951a3781f4f2c1911b05e61c160e9c30eaa8e
https://github.com/containerd/containerd/releases/tag/v1.3.10
https://github.com/containerd/containerd/security/advisories/GHSA-6g2q-w5j3-fwh4 CONFIRM

- Metasploit Modules Related To CVE-2021-21334

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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