NVD Vulnerability Detail
Search Exploit, PoC
CVE-2021-21334
Summary

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.

Publication Date March 11, 2021, 7:15 a.m.
Registration Date March 11, 2021, 10:02 a.m.
Last Update Nov. 21, 2024, 2:48 p.m.
CVSS3.1 : MEDIUM
スコア 6.3
Vector CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
攻撃元区分(AV) ネットワーク
攻撃条件の複雑さ(AC)
攻撃に必要な特権レベル(PR)
利用者の関与(UI) 不要
影響の想定範囲(S) 変更あり
機密性への影響(C)
完全性への影響(I) なし
可用性への影響(A) なし
CVSS2.0 : MEDIUM
Score 4.3
Vector AV:N/AC:M/Au:N/C:P/I:N/A:N
攻撃元区分(AV) ネットワーク
攻撃条件の複雑さ(AC)
攻撃前の認証要否(Au) 不要
機密性への影響(C)
完全性への影響(I) なし
可用性への影響(A) なし
Get all privileges. いいえ
Get user privileges いいえ
Get other privileges いいえ
User operation required いいえ
Affected software configurations
Configuration1 or higher or less more than less than
cpe:2.3:a:linuxfoundation:containerd:*:*:*:*:*:*:*:* 1.4.0 1.4.4
cpe:2.3:a:linuxfoundation:containerd:*:*:*:*:*:*:*:* 1.3.10
Configuration2 or higher or less more than less than
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
Related information, measures and tools
Common Vulnerabilities List

JVN Vulnerability Information
containerd における誤った領域へのリソースの漏えいに関する脆弱性
Title containerd における誤った領域へのリソースの漏えいに関する脆弱性
Summary

containerd には、誤った領域へのリソースの漏えいに関する脆弱性が存在します。

Possible impacts 情報を取得される可能性があります。
Solution

ベンダより正式な対策が公開されています。ベンダ情報を参照して適切な対策を実施してください。

Publication Date March 5, 2021, midnight
Registration Date Nov. 24, 2021, 3:53 p.m.
Last Update Nov. 24, 2021, 3:53 p.m.
Affected System
Fedora Project
Fedora 
Linux Foundation
containerd 1.3.10 未満
containerd 1.4.4 未満
CVE (情報セキュリティ 共通脆弱性識別子)
CWE (共通脆弱性タイプ一覧)
ベンダー情報
Change Log
No Changed Details Date of change
1 [2021年11月24日]
  掲載
Nov. 24, 2021, 3:53 p.m.