Medium severity · published Oct 1, 2020
CVE-2020-16844
In Istio 1.5.0 though 1.5.8 and Istio 1.6.0 through 1.6.7, when users specify an AuthorizationPolicy resource with DENY actions using wildcard suffixes (e.g
6.8
CVSS
1.1%
EPSS
No
On KEV
Description
In Istio 1.5.0 though 1.5.8 and Istio 1.6.0 through 1.6.7, when users specify an AuthorizationPolicy resource with DENY actions using wildcard suffixes (e.g. *-some-suffix) for source principals or namespace fields, callers will never be denied access, bypassing the intended policy.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 65% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IS
Istio · Istio
1.5.0 through 1.5.8; 1.6.0 through 1.6.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-16844
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-16844
Vendor Advisory
https://github.com/istio/istio/releases
Exploit
https://istio.io/latest/news/security/istio-security-2020-009/
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