| Summary | containerd is a container runtime. A bug was found in containerd versions prior to 1.4.8 and 1.5.4 where pulling and extracting a specially-crafted container image can result in Unix file permission changes for existing files in the host’s filesystem. Changes to file permissions can deny access to the expected owner of the file, widen access to others, or set extended bits like setuid, setgid, and sticky. This bug does not directly allow files to be read, modified, or executed without an additional cooperating process. This bug has been fixed in containerd 1.5.4 and 1.4.8. As a workaround, ensure that users only pull images from trusted sources. Linux security modules (LSMs) like SELinux and AppArmor can limit the files potentially affected by this bug through policies and profiles that prevent containerd from interacting with specific files. |
|---|---|
| Publication Date | July 20, 2021, 6:15 a.m. |
| Registration Date | July 20, 2021, 10 a.m. |
| Last Update | Nov. 21, 2024, 3:07 p.m. |
| CVSS3.1 : MEDIUM | |
| スコア | 6.3 |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L |
| 攻撃元区分(AV) | ネットワーク |
| 攻撃条件の複雑さ(AC) | 低 |
| 攻撃に必要な特権レベル(PR) | 不要 |
| 利用者の関与(UI) | 要 |
| 影響の想定範囲(S) | 変更なし |
| 機密性への影響(C) | 低 |
| 完全性への影響(I) | 低 |
| 可用性への影響(A) | 低 |
| CVSS2.0 : MEDIUM | |
| Score | 6.8 |
|---|---|
| Vector | AV:N/AC:M/Au:N/C:P/I:P/A:P |
| 攻撃元区分(AV) | ネットワーク |
| 攻撃条件の複雑さ(AC) | 中 |
| 攻撃前の認証要否(Au) | 不要 |
| 機密性への影響(C) | 低 |
| 完全性への影響(I) | 低 |
| 可用性への影響(A) | 低 |
| Get all privileges. | いいえ |
| Get user privileges | いいえ |
| Get other privileges | いいえ |
| User operation required | はい |
| Configuration1 | or higher | or less | more than | less than | |
| cpe:2.3:a:linuxfoundation:containerd:*:*:*:*:*:*:*:* | 1.5.0 | 1.5.4 | |||
| cpe:2.3:a:linuxfoundation:containerd:*:*:*:*:*:*:*:* | 1.4.8 | ||||
| Configuration2 | or higher | or less | more than | less than | |
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | |||||
| 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、情報を改ざんされる、およびサービス運用妨害 (DoS) 状態に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 | July 19, 2021, midnight |
| Registration Date | June 2, 2022, 4:45 p.m. |
| Last Update | June 2, 2022, 4:45 p.m. |
| Fedora Project |
| Fedora |
| Linux Foundation |
| containerd 1.4.8 未満 |
| containerd 1.5.4 未満 |
| No | Changed Details | Date of change |
|---|---|---|
| 1 | [2022年06月02日] 掲載 |
June 2, 2022, 4:45 p.m. |