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Vulnerability details: VCID-8ev5-c8zj-aaar
Vulnerability ID VCID-8ev5-c8zj-aaar
Aliases CVE-2021-43824
Summary CVE-2021-43824 envoy: Null pointer dereference when using JWT filter safe_regex match
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-476 NULL Pointer Dereference
System Score Found at
rhas Important https://access.redhat.com/errata/RHSA-2022:1275
rhas Important https://access.redhat.com/errata/RHSA-2022:1276
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-43824.json
epss 0.00048 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
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epss 0.00048 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
epss 0.00048 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
epss 0.00048 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
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epss 0.00051 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
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epss 0.00113 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
epss 0.00118 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
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epss 0.00118 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
epss 0.00118 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
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epss 0.00118 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
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epss 0.00118 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
epss 0.00118 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
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epss 0.00118 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
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epss 0.00118 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
epss 0.00118 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
epss 0.00118 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
epss 0.00174 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
epss 0.00174 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
epss 0.00174 https://api.first.org/data/v1/epss?cve=CVE-2021-43824
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=2050744
cvssv3.1 6.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 7.5 https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a
ssvc Track https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a
cvssv3.1 7.5 https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p
ssvc Track https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-43824
cvssv3 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-43824
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-43824
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-43824.json
https://api.first.org/data/v1/epss?cve=CVE-2021-43824
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a
https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p
2050744 https://bugzilla.redhat.com/show_bug.cgi?id=2050744
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*
CVE-2021-43824 https://nvd.nist.gov/vuln/detail/CVE-2021-43824
ISTIO-SECURITY-2022-003 https://istio.io/latest/news/security/ISTIO-SECURITY-2022-003/
RHSA-2022:1275 https://access.redhat.com/errata/RHSA-2022:1275
RHSA-2022:1276 https://access.redhat.com/errata/RHSA-2022:1276
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-43824.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:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
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:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-04-23T15:57:27Z/ Found at https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-04-23T15:57:27Z/ Found at https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-43824
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:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-43824
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:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-43824
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 0.11925
EPSS Score 0.00048
Published At March 28, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.