Vulnerability CVE-2019-6521


Published: 2019-02-05

Description:
WebAccess/SCADA, Version 8.3. Specially crafted requests could allow a possible authentication bypass that could allow an attacker to obtain and manipulate sensitive information.

Type:

CWE-287

(Improper Authentication)

Vendor: Advantech
Product: Webaccess/scada 
Version: 8.3;

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial

 References:
http://www.securityfocus.com/bid/106722
https://ics-cert.us-cert.gov/advisories/ICSA-19-024-01

Related CVE
CVE-2019-16901
Advantech WebAccess/HMI Designer 2.1.9.31 has Exception Handler Chain corruption starting at Unknown Symbol @ 0x0000000000000000 called from ntdll!RtlRaiseStatus+0x00000000000000b4.
CVE-2019-16900
Advantech WebAccess/HMI Designer 2.1.9.31 has a User Mode Write AV starting at MSVCR90!memcpy+0x000000000000015c.
CVE-2019-16899
In Advantech WebAccess/HMI Designer 2.1.9.31, Data from a Faulting Address controls Code Flow starting at PM_V3!CTagInfoThreadBase::GetNICInfo+0x0000000000512918.
CVE-2019-13558
In WebAccess versions 8.4.1 and prior, an exploit executed over the network may cause improper control of generation of code, which may allow remote code execution, data exfiltration, or cause a system crash.
CVE-2019-13556
In WebAccess versions 8.4.1 and prior, multiple stack-based buffer overflow vulnerabilities are caused by a lack of proper validation of the length of user-supplied data. Exploitation of these vulnerabilities may allow remote code execution.
CVE-2019-13552
In WebAccess versions 8.4.1 and prior, multiple command injection vulnerabilities are caused by a lack of proper validation of user-supplied data and may allow arbitrary file deletion and remote code execution.
CVE-2019-13550
In WebAccess, versions 8.4.1 and prior, an improper authorization vulnerability may allow an attacker to disclose sensitive information, cause improper control of generation of code, which may allow remote code execution or cause a system crash.
CVE-2019-3975
Stack-based buffer overflow in Advantech WebAccess/SCADA 8.4.1 allows a remote, unauthenticated attacker to execute arbitrary code via a crafted IOCTL 70603 RPC message.

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