Envoy up to 1.16.4/1.17.3/1.18.3/1.19.0 ext-authz Extension authorization

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability has been found in Envoy up to 1.16.4/1.17.3/1.18.3/1.19.0 and classified as critical. This impacts an unknown function of the component ext-authz Extension. Performing a manipulation results in authorization. This vulnerability was named CVE-2021-32777. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in Envoy up to 1.16.4/1.17.3/1.18.3/1.19.0. This affects an unknown part of the component ext-authz Extension. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. This is going to have an impact on confidentiality.

The weakness was presented 08/25/2021. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2021-32777. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 1.16.5, 1.17.4, 1.18.4 or 1.19.1 eliminates this vulnerability. The upgrade is hosted for download at envoyproxy.io.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Authorization
CWE: CWE-863 / CWE-285 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Envoy 1.16.5/1.17.4/1.18.4/1.19.1

Timelineinfo

05/12/2021 🔍
08/25/2021 +105 days 🔍
08/25/2021 +0 days 🔍
08/29/2021 +4 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-32777 (🔍)
GCVE (CVE): GCVE-0-2021-32777
GCVE (VulDB): GCVE-100-181443

Entryinfo

Created: 08/25/2021 11:22
Updated: 08/29/2021 08:08
Changes: 08/25/2021 11:22 (38), 08/29/2021 08:03 (3), 08/29/2021 08:08 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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