VDB-212465 · CVE-2022-43281 · Issue 1981

WebAssembly wabt 1.0.29 /bits/stl_vector.h size heap-based overflow

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 (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.5	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in WebAssembly wabt 1.0.29. Affected by this vulnerability is the function std::allocator<wabt::Type>>::size in the library /bits/stl_vector.h. The manipulation leads to heap-based overflow. This vulnerability is referenced as CVE-2022-43281. No exploit is available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability, which was classified as critical, has been found in WebAssembly wabt 1.0.29. This issue affects the function std::allocator>::size in the library /bits/stl_vector.h. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

wasm-interp v1.0.29 was discovered to contain a heap overflow via the component std::vector<wabt::Type, std::allocator<wabt::Type>>::size() at /bits/stl_vector.h.

The weakness was published 10/29/2022 as 1981. The advisory is shared at github.com. The identification of this vulnerability is CVE-2022-43281 since 10/17/2022. Technical details are known, but no exploit is available.

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

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2022-46325). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

WebAssembly

Name

wabt

Version

1.0.29

Website

Product: https://github.com/WebAssembly/wabt/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

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 Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

10/17/2022 🔍
10/29/2022 +12 days 🔍
10/29/2022 +0 days 🔍
09/07/2026 +1409 days 🔍

Sourcesinfo

Product: github.com

Advisory: 1981
Status: Confirmed

CVE: CVE-2022-43281 (🔍)
GCVE (CVE): GCVE-0-2022-43281
GCVE (VulDB): GCVE-100-212465
EUVD: 🔍

Entryinfo

Created: 10/29/2022 09:21
Updated: 09/07/2026 23:22
Changes: 10/29/2022 09:21 (40), 11/26/2022 12:01 (12), 10/16/2023 14:53 (7), 05/09/2025 06:05 (15), 09/07/2026 23:22 (2)
Complete: 🔍
Cache ID: 216::103

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