| Summary | A race condition in Linux kernel SCTP sockets (net/sctp/socket.c) before 5.12-rc8 can lead to kernel privilege escalation from the context of a network service or an unprivileged process. If sctp_destroy_sock is called without sock_net(sk)->sctp.addr_wq_lock then an element is removed from the auto_asconf_splist list without any proper locking. This can be exploited by an attacker with network service privileges to escalate to root or from the context of an unprivileged user directly if a BPF_CGROUP_INET_SOCK_CREATE is attached which denies creation of some SCTP socket. |
|---|---|
| Publication Date | April 23, 2021, 3:15 a.m. |
| Registration Date | April 23, 2021, 10:03 a.m. |
| Last Update | Nov. 21, 2024, 2:51 p.m. |
| CVSS3.1 : HIGH | |
| スコア | 7.0 |
|---|---|
| Vector | CVSS:3.1/AV:L/AC:H/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) | 高 |
| 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 : MEDIUM | |
| Score | 6.9 |
|---|---|
| Vector | AV:L/AC:M/Au:N/C:C/I:C/A:C |
| 攻撃元区分(AV) | ローカル |
| 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) | 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:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.11 | 5.11.16 | |||
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.5 | 5.10.32 | |||
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 4.20 | 5.4.114 | |||
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 4.15 | 4.19.189 | |||
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 4.10 | 4.14.232 | |||
| Configuration2 | or higher | or less | more than | less than | |
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | |||||
| Configuration3 | or higher | or less | more than | less than | |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | |||||
| Configuration4 | or higher | or less | more than | less than | |
| cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* | |||||
| cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:* | |||||
| Configuration5 | or higher | or less | more than | less than | |
| cpe:2.3:o:broadcom:brocade_fabric_operating_system:-:*:*:*:*:*:*:* | |||||
| Configuration6 | or higher | or less | more than | less than | |
| cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:* | |||||
| execution environment | |||||
| 1 | cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:* | ||||
| Configuration7 | or higher | or less | more than | less than | |
| cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* | |||||
| execution environment | |||||
| 1 | cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* | ||||
| Configuration8 | or higher | or less | more than | less than | |
| cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* | |||||
| execution environment | |||||
| 1 | cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* | ||||
| Configuration9 | or higher | or less | more than | less than | |
| cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* | |||||
| execution environment | |||||
| 1 | cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* | ||||
| Configuration10 | or higher | or less | more than | less than | |
| cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:* | |||||
| execution environment | |||||
| 1 | cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:* | ||||
| Configuration11 | or higher | or less | more than | less than | |
| cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:* | |||||
| execution environment | |||||
| 1 | cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:* | ||||
| Configuration12 | or higher | or less | more than | less than | |
| cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:* | |||||
| execution environment | |||||
| 1 | cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:* | ||||
| Configuration13 | or higher | or less | more than | less than | |
| cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* | |||||
| execution environment | |||||
| 1 | cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:* | ||||
| Configuration14 | or higher | or less | more than | less than | |
| cpe:2.3:o:netapp:solidfire_baseboard_management_controller_firmware:-:*:*:*:*:*:*:* | |||||
| execution environment | |||||
| 1 | cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:* | ||||
| Title | Linux kernel における競合状態に関する脆弱性 |
|---|---|
| Summary | Linux kernel には、競合状態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 | April 13, 2021, midnight |
| Registration Date | Dec. 16, 2021, 6:12 p.m. |
| Last Update | Dec. 16, 2021, 6:12 p.m. |
| Fedora Project |
| Fedora |
| Linux |
| Linux Kernel 5.12-rc8 未満 |
| No | Changed Details | Date of change |
|---|---|---|
| 1 | [2021年12月16日] 掲載 |
Dec. 16, 2021, 6:12 p.m. |