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Vulnerability details: VCID-5jkw-4a5e-aaak
Vulnerability ID VCID-5jkw-4a5e-aaak
Aliases CVE-2020-16844
GHSA-82mm-ffjr-h86c
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-284 Improper Access Control
System Score Found at
rhas Moderate https://access.redhat.com/errata/RHSA-2020:3425
cvssv3 6.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-16844.json
epss 0.00078 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00078 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00078 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00078 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00079 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00079 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00079 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00079 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00079 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00079 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00079 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00079 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00079 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00079 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00079 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00079 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00162 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00284 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
epss 0.00456 https://api.first.org/data/v1/epss?cve=CVE-2020-16844
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1861625
cvssv3.1 6.8 https://github.com/istio/istio/commit/4c73414556b83f0e75c1b3a0a89a23103a71573c
generic_textual MODERATE https://github.com/istio/istio/commit/4c73414556b83f0e75c1b3a0a89a23103a71573c
cvssv3.1 6.8 https://github.com/istio/istio/commit/72d2e135374f421b656d6f1a21f474db46134ace
generic_textual MODERATE https://github.com/istio/istio/commit/72d2e135374f421b656d6f1a21f474db46134ace
cvssv3.1 6.8 https://github.com/istio/istio/releases
generic_textual MODERATE https://github.com/istio/istio/releases
cvssv3.1 6.8 https://github.com/istio/istio/releases/tag/1.5.9
generic_textual MODERATE https://github.com/istio/istio/releases/tag/1.5.9
cvssv3.1 6.8 https://github.com/istio/istio/releases/tag/1.6.8
generic_textual MODERATE https://github.com/istio/istio/releases/tag/1.6.8
cvssv3.1 6.8 https://istio.io/latest/news/releases/1.5.x/announcing-1.5.9
generic_textual MODERATE https://istio.io/latest/news/releases/1.5.x/announcing-1.5.9
cvssv3.1 6.8 https://istio.io/latest/news/releases/1.6.x/announcing-1.6.8
generic_textual MODERATE https://istio.io/latest/news/releases/1.6.x/announcing-1.6.8
cvssv3.1 6.8 https://istio.io/latest/news/security/istio-security-2020-009
generic_textual MODERATE https://istio.io/latest/news/security/istio-security-2020-009
cvssv2 4.9 https://nvd.nist.gov/vuln/detail/CVE-2020-16844
cvssv3 6.8 https://nvd.nist.gov/vuln/detail/CVE-2020-16844
cvssv3.1 6.8 https://nvd.nist.gov/vuln/detail/CVE-2020-16844
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-16844.json
https://api.first.org/data/v1/epss?cve=CVE-2020-16844
https://github.com/istio/istio/commit/4c73414556b83f0e75c1b3a0a89a23103a71573c
https://github.com/istio/istio/commit/72d2e135374f421b656d6f1a21f474db46134ace
https://github.com/istio/istio/releases
https://github.com/istio/istio/releases/tag/1.5.9
https://github.com/istio/istio/releases/tag/1.6.8
https://istio.io/latest/news/releases/1.5.x/announcing-1.5.9
https://istio.io/latest/news/releases/1.6.x/announcing-1.6.8
https://istio.io/latest/news/security/istio-security-2020-009
https://istio.io/latest/news/security/istio-security-2020-009/
1861625 https://bugzilla.redhat.com/show_bug.cgi?id=1861625
cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*
CVE-2020-16844 https://nvd.nist.gov/vuln/detail/CVE-2020-16844
ISTIO-SECURITY-2020-009 https://istio.io/latest/news/security/ISTIO-SECURITY-2020-009/
RHSA-2020:3425 https://access.redhat.com/errata/RHSA-2020:3425
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-16844.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/istio/istio/commit/4c73414556b83f0e75c1b3a0a89a23103a71573c
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/istio/istio/commit/72d2e135374f421b656d6f1a21f474db46134ace
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/istio/istio/releases
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/istio/istio/releases/tag/1.5.9
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/istio/istio/releases/tag/1.6.8
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://istio.io/latest/news/releases/1.5.x/announcing-1.5.9
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://istio.io/latest/news/releases/1.6.x/announcing-1.6.8
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://istio.io/latest/news/security/istio-security-2020-009
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:S/C:P/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-16844
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-16844
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-16844
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.35872
EPSS Score 0.00078
Published At Dec. 17, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.