H2O up to 2.3.0-beta2 QUIC Stack allocation of resources

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

Summaryinfo

A vulnerability, which was classified as problematic, has been found in H2O up to 2.3.0-beta2. Affected by this issue is some unknown functionality of the component QUIC Stack. This manipulation causes allocation of resources. This vulnerability appears as CVE-2023-50247. The attack may be initiated remotely. There is no available exploit. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in H2O up to 2.3.0-beta2. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the component QUIC Stack. The manipulation with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. As an impact it is known to affect availability. The summary by CVE is:

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. The QUIC stack (quicly), as used by H2O up to commit 43f86e5 (in version 2.3.0-beta and prior), is susceptible to a state exhaustion attack. When H2O is serving HTTP/3, a remote attacker can exploit this vulnerability to progressively increase the memory retained by the QUIC stack. This can eventually cause H2O to abort due to memory exhaustion. The vulnerability has been resolved in commit d67e81d03be12a9d53dc8271af6530f40164cd35. HTTP/1 and HTTP/2 are not affected by this vulnerability as they do not use QUIC. Administrators looking to mitigate this issue without upgrading can disable HTTP/3 support.

The weakness was presented 12/12/2023. The advisory is shared at github.com. This vulnerability is known as CVE-2023-50247 since 12/05/2023. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Applying the patch d67e81d03be12a9d53dc8271af6530f40164cd35 is able to eliminate this problem.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Version

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, Inc.): 🔍

CVSSv2info

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

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
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: d67e81d03be12a9d53dc8271af6530f40164cd35

Timelineinfo

12/05/2023 🔍
12/12/2023 +7 days 🔍
12/12/2023 +0 days 🔍
01/04/2024 +23 days 🔍

Sourcesinfo

Product: github.com

Advisory: d67e81d03be12a9d53dc8271af6530f40164cd35
Status: Confirmed

CVE: CVE-2023-50247 (🔍)
GCVE (CVE): GCVE-0-2023-50247
GCVE (VulDB): GCVE-100-247633

Entryinfo

Created: 12/12/2023 21:38
Updated: 01/04/2024 08:31
Changes: 12/12/2023 21:38 (47), 01/04/2024 08:29 (2), 01/04/2024 08:31 (12)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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