Vulnerability Details : CVE-2020-27833
A Zip Slip vulnerability was found in the oc binary in openshift-clients where an arbitrary file write is achieved by using a specially crafted raw container image (.tar file) which contains symbolic links. The vulnerability is limited to the command `oc image extract`. If a symbolic link is first created pointing within the tarball, this allows further symbolic links to bypass the existing path check. This flaw allows the tarball to create links outside the tarball's parent directory, allowing for executables or configuration files to be overwritten, resulting in arbitrary code execution. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. Versions up to and including openshift-clients-4.7.0-202104250659.p0.git.95881af are affected.
Vulnerability category: Input validation
Products affected by CVE-2020-27833
- cpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-27833
0.13%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 29 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-27833
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.6
|
MEDIUM | AV:N/AC:H/Au:S/C:P/I:P/A:P |
3.9
|
6.4
|
NIST | |
|
7.1
|
HIGH | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H |
1.2
|
5.9
|
NIST |
CWE ids for CVE-2020-27833
-
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.Assigned by: secalert@redhat.com (Secondary)
-
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)
References for CVE-2020-27833
-
https://access.redhat.com/security/cve/CVE-2020-27833
CVE-2020-27833- Red Hat Customer PortalVendor Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=1905945
1905945 – (CVE-2020-27833) CVE-2020-27833 openshift/oc: zip slip - arbitrary file write vulnerability / arbitrary code execution using a specially crafted container imageIssue Tracking;Vendor Advisory
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