H2O Reverse Proxy assertion

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in H2O. Affected by this issue is some unknown functionality of the component Reverse Proxy Handler. Such manipulation leads to assertion. This vulnerability is traded as CVE-2024-45403. The attack may be launched remotely. There is no exploit available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in H2O (the affected version unknown) and classified as problematic. Affected by this issue is an unknown part of the component Reverse Proxy Handler. The manipulation with an unknown input leads to a assertion vulnerability. Using CWE to declare the problem leads to CWE-617. The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. Impacted is availability. CVE summarizes:

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. When h2o is configured as a reverse proxy and HTTP/3 requests are cancelled by the client, h2o might crash due to an assertion failure. The crash can be exploited by an attacker to mount a Denial-of-Service attack. By default, the h2o standalone server automatically restarts, minimizing the impact. However, HTTP requests that were served concurrently will still be disrupted. The vulnerability has been addressed in commit 1ed32b2. Users may disable the use of HTTP/3 to mitigate the issue.

The advisory is available at github.com. This vulnerability is handled as CVE-2024-45403 since 08/28/2024. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available.

Applying the patch 16b13eee8ad7895b4fe3fcbcabee53bd52782562 is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 3.7
CNA Vector (GitHub_M): 🔍

CVSSv2info

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

Exploitinginfo

Class: Assertion
CWE: CWE-617
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: 16b13eee8ad7895b4fe3fcbcabee53bd52782562

Timelineinfo

08/28/2024 🔍
10/11/2024 +44 days 🔍
10/11/2024 +0 days 🔍
11/13/2024 +33 days 🔍

Sourcesinfo

Product: github.com

Advisory: GHSA-4xp5-3jhc-3m92
Status: Confirmed

CVE: CVE-2024-45403 (🔍)
GCVE (CVE): GCVE-0-2024-45403
GCVE (VulDB): GCVE-100-280094

Entryinfo

Created: 10/11/2024 18:10
Updated: 11/13/2024 07:47
Changes: 10/11/2024 18:10 (63), 11/13/2024 07:47 (12)
Complete: 🔍
Cache ID: 216::103

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