Vulnerability CVE-2022-21655

Vulnerability Name:

CVE-2022-21655 (CCN-220184)

Assigned:

2021-11-16

Published:

2022-02-22

Updated:

2022-03-02

Summary:

Envoy is an open source edge and service proxy, designed for cloud-native applications. The envoy common router will segfault if an internal redirect selects a route configured with direct response or redirect actions. This will result in a denial of service. As a workaround turn off internal redirects if direct response entries are configured on the same listener.

CVSS v3 Severity:

7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

CVSS v2 Severity:

4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Complete

Vulnerability Type:

CWE-670

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2022-21655

Source: XF
Type: UNKNOWN
envoy-cve202221655-dos(220184)

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/envoyproxy/envoy/commit/177d608155ba8b11598b9bbf8240e90d8c350682

Source: CCN
Type: Envoy GIT Repository
Incorrect handling of internal redirects to routes with a direct response entry

Source: CONFIRM
Type: Issue Tracking, Third Party Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-7r5p-7fmh-jxpg

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2022-21655

Vulnerable Configuration:

Configuration 1:

cpe:/a:envoyproxy:envoy:*:*:*:*:*:*:*:* (Version < 1.18.6)

OR cpe:/a:envoyproxy:envoy:*:*:*:*:*:*:*:* (Version >= 1.19.0 and < 1.19.3)

OR cpe:/a:envoyproxy:envoy:*:*:*:*:*:*:*:* (Version >= 1.20.0 and < 1.20.2)

OR cpe:/a:envoyproxy:envoy:*:*:*:*:*:*:*:* (Version >= 1.21.0 and < 1.21.1)

Denotes that component is vulnerable

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