| Summary | Bubblewrap (bwrap) before version 0.4.1, if installed in setuid mode and the kernel supports unprivileged user namespaces, then the `bwrap --userns2` option can be used to make the setuid process keep running as root while being traceable. This can in turn be used to gain root permissions. Note that this only affects the combination of bubblewrap in setuid mode (which is typically used when unprivileged user namespaces are not supported) and the support of unprivileged user namespaces. Known to be affected are: * Debian testing/unstable, if unprivileged user namespaces enabled (not default) * Debian buster-backports, if unprivileged user namespaces enabled (not default) * Arch if using `linux-hardened`, if unprivileged user namespaces enabled (not default) * Centos 7 flatpak COPR, if unprivileged user namespaces enabled (not default) This has been fixed in the 0.4.1 release, and all affected users should update. |
|---|---|
| Publication Date | April 1, 2020, 3:15 a.m. |
| Registration Date | Jan. 26, 2021, 11:59 a.m. |
| Last Update | Nov. 21, 2024, 2:33 p.m. |
| CVSS3.1 : HIGH | |
| スコア | 7.8 |
|---|---|
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 攻撃元区分(AV) | ローカル |
| 攻撃条件の複雑さ(AC) | 低 |
| 攻撃に必要な特権レベル(PR) | 低 |
| 利用者の関与(UI) | 不要 |
| 影響の想定範囲(S) | 変更なし |
| 機密性への影響(C) | 高 |
| 完全性への影響(I) | 高 |
| 可用性への影響(A) | 高 |
| CVSS2.0 : HIGH | |
| Score | 8.5 |
|---|---|
| Vector | AV:N/AC:M/Au:S/C:C/I:C/A:C |
| 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) | 単一 |
| 機密性への影響(C) | 高 |
| 完全性への影響(I) | 高 |
| 可用性への影響(A) | 高 |
| Get all privileges. | いいえ |
| Get user privileges | いいえ |
| Get other privileges | いいえ |
| User operation required | いいえ |
| Configuration1 | or higher | or less | more than | less than | |
| cpe:2.3:a:projectatomic:bubblewrap:*:*:*:*:*:*:*:* | 0.4.1 | ||||
| Configuration2 | or higher | or less | more than | less than | |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | |||||
| Configuration3 | or higher | or less | more than | less than | |
| cpe:2.3:o:archlinux:arch_linux:-:*:*:*:*:*:*:* | |||||
| Configuration4 | or higher | or less | more than | less than | |
| cpe:2.3:o:centos:centos:7.0:*:*:*:*:*:*:* | |||||
| Title | Bubblewrap における権限管理に関する脆弱性 |
|---|---|
| Summary | Bubblewrap (bwrap) には、権限管理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 | ベンダ情報および参考情報を参照して適切な対策を実施してください。 |
| Publication Date | March 30, 2020, midnight |
| Registration Date | April 21, 2020, 5:15 p.m. |
| Last Update | April 21, 2020, 5:15 p.m. |
| Arch Linux |
| Arch Linux |
| Debian |
| Debian GNU/Linux |
| CentOS Project |
| CentOS |
| Project Atomic |
| Bubblewrap 0.4.1 未満 |
| No | Changed Details | Date of change |
|---|---|---|
| 1 | [2020年04月21日] 掲載 |
April 21, 2020, 5:15 p.m. |