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Vulnerability details: VCID-dx29-y4ke-aaag
Vulnerability ID VCID-dx29-y4ke-aaag
Aliases CVE-2021-43825
Summary CVE-2021-43825 envoy: Use-after-free when response filters increase response data
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-416 Use After Free
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-2021-43825.json
epss 0.0003 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.0003 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.0003 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.0003 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.0003 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.0003 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.0003 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.0003 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00032 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00052 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
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epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
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epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00091 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00092 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.0014 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.0014 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
epss 0.0014 https://api.first.org/data/v1/epss?cve=CVE-2021-43825
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=2050746
cvssv3.1 6.1 https://github.com/envoyproxy/envoy/commit/148de954ed3585d8b4298b424aa24916d0de6136
ssvc Track https://github.com/envoyproxy/envoy/commit/148de954ed3585d8b4298b424aa24916d0de6136
cvssv3.1 6.1 https://github.com/envoyproxy/envoy/security/advisories/GHSA-h69p-g6xg-mhhh
ssvc Track https://github.com/envoyproxy/envoy/security/advisories/GHSA-h69p-g6xg-mhhh
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2021-43825
cvssv3 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-43825
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-43825
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-43825.json
https://api.first.org/data/v1/epss?cve=CVE-2021-43825
https://github.com/envoyproxy/envoy/commit/148de954ed3585d8b4298b424aa24916d0de6136
https://github.com/envoyproxy/envoy/security/advisories/GHSA-h69p-g6xg-mhhh
2050746 https://bugzilla.redhat.com/show_bug.cgi?id=2050746
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-2021-43825 https://nvd.nist.gov/vuln/detail/CVE-2021-43825
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-2021-43825.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:N/UI:R/S:C/C:N/I:L/A:L Found at https://github.com/envoyproxy/envoy/commit/148de954ed3585d8b4298b424aa24916d0de6136
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:N/T:P/P:M/B:A/M:M/D:T/2025-04-23T14:10:09Z/ Found at https://github.com/envoyproxy/envoy/commit/148de954ed3585d8b4298b424aa24916d0de6136
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:L Found at https://github.com/envoyproxy/envoy/security/advisories/GHSA-h69p-g6xg-mhhh
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:N/T:P/P:M/B:A/M:M/D:T/2025-04-23T14:10:09Z/ Found at https://github.com/envoyproxy/envoy/security/advisories/GHSA-h69p-g6xg-mhhh
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-43825
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-2021-43825
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-2021-43825
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 0.05387
EPSS Score 0.0003
Published At March 28, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.