CVE-2021-33023 : Advantech WebAccess versions 9.02 and prior are vulnerable to a heap-based buffe

Advantech WebAccess versions 9.02 and prior are vulnerable to a heap-based buffer overflow, which may allow an attacker to remotely execute code.

Published 2021-10-18 13:15:09

Updated 2021-10-20 22:16:02

Source ICS-CERT

View at NVD, CVE.org

Vulnerability category: OverflowMemory CorruptionExecute code

Products affected by CVE-2021-33023

Advantech » Webaccess
Versions up to, including, (<=) 9.0.2
cpe:2.3:a:advantech:webaccess:*:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.94%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 83 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.5	HIGH	AV:N/AC:L/Au:N/C:P/I:P/A:P	10.0	6.4	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	ICS-CERT
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE-122 Heap-based Buffer Overflow

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().

Assigned by: ics-cert@hq.dhs.gov (Secondary)
CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Assigned by: nvd@nist.gov (Primary)

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