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

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in WAVM up to 2018-07-26. This issue affects the function FunctionValidationContext::else_ of the component WebAssembly Virtual Machine. Such manipulation leads to memory corruption. This vulnerability is documented as CVE-2018-16765. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in WAVM up to 2018-07-26. It has been rated as critical. Affected by this issue is the function FunctionValidationContext::else_ of the component WebAssembly Virtual Machine. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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 unspecified "heap-buffer-overflow" condition in FunctionValidationContext::else_.

The bug was discovered 07/26/2018. The weakness was released 09/10/2018 (Website). The advisory is shared for download at github.com. This vulnerability is handled as CVE-2018-16765 since 09/09/2018. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

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.

Entries connected to this vulnerability are available at VDB-123780, VDB-123779, VDB-123778 and VDB-123777. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Version

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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍

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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: 94
Status: Not defined

CVE: CVE-2018-16765 (🔍)
GCVE (CVE): GCVE-0-2018-16765
GCVE (VulDB): GCVE-100-123776
See also: 🔍

Entryinfo

Created: 09/10/2018 07:34
Updated: 05/07/2023 16:28
Changes: 09/10/2018 07:34 (58), 03/22/2020 08:09 (1), 05/07/2023 16:28 (3)
Complete: 🔍
Cache ID: 216::103

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