Envoy HTTP/2 Stream http/2 use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Envoy. Affected is an unknown function of the file http/2 of the component HTTP2 Stream Handler. The manipulation results in use after free. This vulnerability is reported as CVE-2021-43826. The attack can be launched remotely. No exploit exists. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in Envoy (unknown version). It has been classified as problematic. Affected is an unknown code block of the file http/2 of the component HTTP2 Stream Handler. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on availability.

The weakness was disclosed 02/23/2022 as GHSA-cmx3-fvgf-83mf. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2021-43826 since 11/16/2021. There are known technical details, but no exploit is available.

Applying the patch ce0ae309057a216aba031aff81c445c90c6ef145 is able to eliminate this problem. The bugfix is ready for download at github.com.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

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

CNA Base Score: 7.5
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

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

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: ce0ae309057a216aba031aff81c445c90c6ef145

Timelineinfo

11/16/2021 🔍
02/23/2022 +99 days 🔍
02/23/2022 +0 days 🔍
02/25/2022 +2 days 🔍

Sourcesinfo

Advisory: GHSA-cmx3-fvgf-83mf
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-43826 (🔍)
GCVE (CVE): GCVE-0-2021-43826
GCVE (VulDB): GCVE-100-193632

Entryinfo

Created: 02/23/2022 07:39
Updated: 02/25/2022 14:34
Changes: 02/23/2022 07:39 (50), 02/25/2022 14:34 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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