VDB-182876 · CVE-2021-39219 · GCVE-0-2021-39219

Wasmtime up to 0.29.x type confusion

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.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Wasmtime up to 0.29.x. Affected by this issue is some unknown functionality. Such manipulation leads to type confusion. This vulnerability is documented as CVE-2021-39219. The attack needs to be performed locally. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Wasmtime up to 0.29.x and classified as critical. Affected by this issue is an unknown functionality. The manipulation with an unknown input leads to a type confusion vulnerability. Using CWE to declare the problem leads to CWE-843. The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type. Impacted is confidentiality, integrity, and availability.

The weakness was released 09/18/2021 as b39f087414f27ae40c44449ed5d1154e03449bff. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2021-39219 since 08/16/2021. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

Upgrading to version 0.30.0 eliminates this vulnerability. Applying the patch b39f087414f27ae40c44449ed5d1154e03449bff is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Wasmtime

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.5
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.3
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Type confusion
CWE: CWE-843
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Wasmtime 0.30.0
Patch: b39f087414f27ae40c44449ed5d1154e03449bff

Timelineinfo

08/16/2021 🔍
09/18/2021 +33 days 🔍
09/18/2021 +0 days 🔍
09/22/2021 +4 days 🔍

Sourcesinfo

Advisory: b39f087414f27ae40c44449ed5d1154e03449bff
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-39219 (🔍)
GCVE (CVE): GCVE-0-2021-39219
GCVE (VulDB): GCVE-100-182876

Entryinfo

Created: 09/18/2021 06:52
Updated: 09/22/2021 15:24
Changes: 09/18/2021 06:52 (50), 09/22/2021 15:18 (2), 09/22/2021 15:24 (1)
Complete: 🔍
Cache ID: 216::103