Vulnerability Details : CVE-2019-11251
The Kubernetes kubectl cp command in versions 1.1-1.12, and versions prior to 1.13.11, 1.14.7, and 1.15.4 allows a combination of two symlinks provided by tar output of a malicious container to place a file outside of the destination directory specified in the kubectl cp invocation. This could be used to allow an attacker to place a nefarious file using a symlink, outside of the destination tree.
Products affected by CVE-2019-11251
- cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*
- cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*
- cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*
- cpe:2.3:a:kubernetes:kubernetes:1.1-1.12:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-11251
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 17 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-11251
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N |
8.6
|
2.9
|
NIST | |
4.8
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N |
1.2
|
3.6
|
Kubernetes | |
5.7
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N |
2.1
|
3.6
|
NIST |
CWE ids for CVE-2019-11251
-
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.Assigned by: nvd@nist.gov (Primary)
-
The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files.Assigned by: jordan@liggitt.net (Secondary)
References for CVE-2019-11251
-
https://groups.google.com/d/msg/kubernetes-announce/YYtEFdFimZ4/nZnOezZuBgAJ
[ANNOUNCE] Security release of kubectl versions v1.16.0 / 1.15.4 / 1.14.7 and 1.13.11 - CVE-2019-11251 - Google GroepenMailing List;Third Party Advisory
-
https://github.com/kubernetes/kubernetes/issues/87773
CVE-2019-11251: kubectl cp symlink vulnerability · Issue #87773 · kubernetes/kubernetes · GitHubThird Party Advisory
Jump to