WAVM up to 2018-07-26 WebAssembly Virtual Machine catch_all memory corruption

HistoryDiffrelatejsonxmlCTI

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.
7.5	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in WAVM up to 2018-07-26. This vulnerability affects the function IR::FunctionValidationContext::catch_all of the component WebAssembly Virtual Machine. This manipulation causes memory corruption. This vulnerability is registered as CVE-2018-16764. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in WAVM up to 2018-07-26. It has been declared as critical. Affected by this vulnerability is the function IR::FunctionValidationContext::catch_all of the component WebAssembly Virtual Machine. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In WAVM through 2018-07-26, a crafted file sent to the WebAssembly Virtual Machine may cause a denial of service (application crash) or possibly have unspecified other impact because of an IR::FunctionValidationContext::catch_all heap-based buffer over-read.

The bug was discovered 07/26/2018. The weakness was published 09/10/2018 (Website). It is possible to read the advisory at github.com. This vulnerability is known as CVE-2018-16764 since 09/09/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 46 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Similar entries are available at VDB-123779, VDB-123778, VDB-123777 and VDB-123776. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

WAVM

Version

2018-07-26

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.6

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

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: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/26/2018 🔍
09/09/2018 +44 days 🔍
09/10/2018 +1 days 🔍
09/10/2018 +0 days 🔍
09/10/2018 +0 days 🔍
05/07/2023 +1700 days 🔍

Sourcesinfo

Advisory: 93
Status: Not defined

CVE: CVE-2018-16764 (🔍)
GCVE (CVE): GCVE-0-2018-16764
GCVE (VulDB): GCVE-100-123775
See also: 🔍

Entryinfo

Created: 09/10/2018 07:33
Updated: 05/07/2023 16:20
Changes: 09/10/2018 07:33 (57), 03/22/2020 08:06 (1), 05/07/2023 16:20 (3)
Complete: 🔍
Cache ID: 216::103