Envoy default_validator.cc subjectAltNames certificate validation
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
6.4 | $0-$5k | 0.00 |
A vulnerability classified as critical was found in Envoy (version unknown). Affected by this vulnerability is an unknown function of the file default_validator.cc. The manipulation of the argument subjectAltNames
with an unknown input leads to a certificate validation vulnerability. The CWE definition for the vulnerability is CWE-295. The product does not validate, or incorrectly validates, a certificate. As an impact it is known to affect confidentiality, integrity, and availability.
The weakness was disclosed 02/23/2022 as GHSA-c9g7-xwcv-pjx2. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2022-21656 since 11/16/2021. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1587.003 according to MITRE ATT&CK.
Applying the patch bb95af848c939cfe5b5ee33c5b1770558077e64e is able to eliminate this problem. The bugfix is ready for download at github.com.
Product
Name
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 6.5VulDB Meta Temp Score: 6.4
VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍
CNA Base Score: 7.4
CNA Vector (GitHub, Inc.): 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
---|---|---|---|---|---|
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
Exploiting
Class: Certificate validationCWE: CWE-295 / CWE-287
ATT&CK: T1587.003
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: PatchStatus: 🔍
0-Day Time: 🔍
Patch: bb95af848c939cfe5b5ee33c5b1770558077e64e
Timeline
11/16/2021 🔍02/23/2022 🔍
02/23/2022 🔍
02/25/2022 🔍
Sources
Advisory: GHSA-c9g7-xwcv-pjx2Status: Confirmed
Confirmation: 🔍
CVE: CVE-2022-21656 (🔍)
Entry
Created: 02/23/2022 07:29Updated: 02/25/2022 14:22
Changes: 02/23/2022 07:29 (50), 02/25/2022 14:22 (2)
Complete: 🔍
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