GitHub Advisory DatabaseGHSA-82MM-FFJR-H86CAuthorization bypass in Istio
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:S/C:P/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS
Percentile
34.4%
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.
Specific Go Packages Affected
Affected configurations
References
github.com/advisories/GHSA-82mm-ffjr-h86c
github.com/istio/istio/commit/4c73414556b83f0e75c1b3a0a89a23103a71573c
github.com/istio/istio/commit/72d2e135374f421b656d6f1a21f474db46134ace
github.com/istio/istio/releases
github.com/istio/istio/releases/tag/1.5.9
github.com/istio/istio/releases/tag/1.6.8
istio.io/latest/news/releases/1.5.x/announcing-1.5.9/
istio.io/latest/news/releases/1.6.x/announcing-1.6.8/
istio.io/latest/news/security/istio-security-2020-009/
nvd.nist.gov/vuln/detail/CVE-2020-16844
Related
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:S/C:P/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS
Percentile
34.4%