Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-21284 |
CWE-ID | CWE-264 |
Exploitation vector | Local network |
Public exploit | N/A |
Vulnerable software Subscribe |
docker (Alpine package) Operating systems & Components / Operating system package or component |
Vendor | Alpine Linux Development Team |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU50273
Risk: Medium
CVSSv3.1: 7 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-21284
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to application does not properly impose security restrictions when using the --userns-remap option. A remote authenticated attacker on the local network can send a specially crafted request and gain elevated privileges as root on the system.
MitigationInstall update from vendor's website.
Vulnerable software versionsdocker (Alpine package): 20.10.2-r0
CPE2.3 External linkshttp://git.alpinelinux.org/aports/commit/?id=e278e390a25855d568389be4d87d8e7328f90d71
http://git.alpinelinux.org/aports/commit/?id=b6492956611e628ca5b96716fcb3fd20727d993d
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.