Vulnerability Details : CVE-2020-8843
An issue was discovered in Istio 1.3 through 1.3.6. Under certain circumstances, it is possible to bypass a specifically configured Mixer policy. Istio-proxy accepts the x-istio-attributes header at ingress that can be used to affect policy decisions when Mixer policy selectively applies to a source equal to ingress. To exploit this vulnerability, someone has to encode a source.uid in this header. This feature is disabled by default in Istio 1.3 and 1.4.
Vulnerability category: Input validation
Products affected by CVE-2020-8843
- cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-8843
0.23%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 61 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-8843
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:N |
8.6
|
4.9
|
NIST | |
7.4
|
HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
2.2
|
5.2
|
NIST |
CWE ids for CVE-2020-8843
-
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: nvd@nist.gov (Primary)
References for CVE-2020-8843
-
https://github.com/istio/istio/commits/master
Commits · istio/istio · GitHubPatch
-
https://istio.io/news/security/istio-security-2020-002/
Istio / ISTIO-SECURITY-2020-002Vendor Advisory
-
https://istio.io/news/security/
Istio / Security BulletinsVendor Advisory
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