Linux Kernel における入力確認に関する脆弱性
| Title |
Linux Kernel における入力確認に関する脆弱性
|
| Summary |
Linux Kernel には、入力確認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 |
Jan. 5, 2021, midnight |
| Registration Date |
Nov. 12, 2021, 2:23 p.m. |
| Last Update |
Nov. 12, 2021, 2:23 p.m. |
|
CVSS3.0 : 重要
|
| Score |
7.8
|
| Vector |
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
|
CVSS2.0 : 警告
|
| Score |
4.6
|
| Vector |
AV:L/AC:L/Au:N/C:P/I:P/A:P |
Affected System
| レッドハット |
|
Red Hat Enterprise Linux
|
|
Red Hat OpenShift Container Platform
|
| Linux |
|
Linux Kernel
|
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12日]
掲載 |
Nov. 12, 2021, 2:23 p.m. |
NVD Vulnerability Information
CVE-2021-20194
| Summary |
There is a vulnerability in the linux kernel versions higher than 5.2 (if kernel compiled with config params CONFIG_BPF_SYSCALL=y , CONFIG_BPF=y , CONFIG_CGROUPS=y , CONFIG_CGROUP_BPF=y , CONFIG_HARDENED_USERCOPY not set, and BPF hook to getsockopt is registered). As result of BPF execution, the local user can trigger bug in __cgroup_bpf_run_filter_getsockopt() function that can lead to heap overflow (because of non-hardened usercopy). The impact of attack could be deny of service or possibly privileges escalation.
|
| Publication Date |
Feb. 24, 2021, 8:15 a.m. |
| Registration Date |
Feb. 24, 2021, 12:01 p.m. |
| Last Update |
Nov. 21, 2024, 2:46 p.m. |
Affected software configurations
| Configuration1 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
|
|
5.2 |
|
| Configuration2 |
or higher |
or less |
more than |
less than |
| cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
|
|
|
|
| cpe:2.3:a:redhat:openshift_container_platform:4.5:*:*:*:*:*:*:* |
|
|
|
|
| cpe:2.3:a:redhat:openshift_container_platform:4.6:*:*:*:*:*:*:* |
|
|
|
|
| cpe:2.3:a:redhat:openshift_container_platform:4.4:*:*:*:*:*:*:* |
|
|
|
|
Related information, measures and tools
Common Vulnerabilities List