High severity · published Sep 20, 2021
CVE-2021-25741
A security issue was discovered in Kubernetes where a user may be able to create a container with subpath volume mounts to access files & directories outside of the volume,…
8.1
CVSS
8%
EPSS
No
On KEV
Description
A security issue was discovered in Kubernetes where a user may be able to create a container with subpath volume mounts to access files & directories outside of the volume, including on the host filesystem.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)8.0% · higher than 95% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KU
Kubernetes · Kubernetes
through 1.19.14; 1.20.0 through 1.20.10; 1.21.0 through 1.21.4; 1.22.0 through 1.22.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-25741
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-25741
Mitigation
https://github.com/kubernetes/kubernetes/issues/104980
Mailing List
https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s
Third Party Advisory
https://security.netapp.com/advisory/ntap-20211008-0006/
More from Kubernetes
9.8
CVE-2018-1002105
In all Kubernetes versions prior to v1.10.11, v1.11.5, and v1.12.3, incorrect handling of error responses to proxied upgrade requests in the kube-apiserver allowed specially…
9.8
CVE-2018-1002101
In Kubernetes versions 1.9.0-1.9.9, 1.10.0-1.10.5, and 1.11.0-1.11.1, user input was handled insecurely while setting up volume mounts on Windows nodes, which could lead to…
9.8
CVE-2017-1000056
Kubernetes version 1.5.0-1.5.4 is vulnerable to a privilege escalation in the PodSecurityPolicy admission plugin resulting in the ability to make use of any existing…
9.8
CVE-2016-1906
Openshift allows remote attackers to gain privileges by updating a build configuration that was created with an allowed type to a type that is not allowed
9.6
CVE-2017-1002101
In Kubernetes versions 1.3.x, 1.4.x, 1.5.x, 1.6.x and prior to versions 1.7.14, 1.8.9 and 1.9.4 containers using subpath volume mounts with any volume type (including…