CVE-2020-9502 : Some Dahua products with Build time before December 2019 have Session ID predict

Some Dahua products with Build time before December 2019 have Session ID predictable vulnerabilities. During normal user access, an attacker can use the predicted Session ID to construct a data packet to attack the device.

Published 2020-05-13 16:15:13

Updated 2020-05-18 19:42:13

Source Dahua Technologies

View at NVD, CVE.org

Products affected by CVE-2020-9502

Dahuasecurity » Sd6al Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:sd6al_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » Sd6al » Version: N/A
Dahuasecurity » Sd5a Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:sd5a_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » Sd5a » Version: N/A
Dahuasecurity » Sd1a Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:sd1a_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » Sd1a » Version: N/A
Dahuasecurity » Ptz1a Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:ptz1a_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » Ptz1a » Version: N/A
Dahuasecurity » Sd50 Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:sd50_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » Sd50 » Version: N/A
Dahuasecurity » Sd52c Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:sd52c_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » Sd52c » Version: N/A
Dahuasecurity » Ipc-hx5842h Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:ipc-hx5842h_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » Ipc-hx5842h » Version: N/A
Dahuasecurity » Ipc-hx7842h Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:ipc-hx7842h_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » Ipc-hx7842h » Version: N/A
Dahuasecurity » Ipc-hx2xxx Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:ipc-hx2xxx_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » Ipc-hx2xxx » Version: N/A
Dahuasecurity » Ipc-hxxx5x4x Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:ipc-hxxx5x4x_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » Ipc-hxxx5x4x » Version: N/A
Dahuasecurity » N42b1p Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:n42b1p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » N42b1p » Version: N/A
Dahuasecurity » N42b2p Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:n42b2p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » N42b2p » Version: N/A
Dahuasecurity » N42b3p Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:n42b3p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » N42b3p » Version: N/A
Dahuasecurity » N52a4p Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:n52a4p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » N52a4p » Version: N/A
Dahuasecurity » N54a4p Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:n54a4p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » N54a4p » Version: N/A
Dahuasecurity » N52b2p Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:n52b2p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » N52b2p » Version: N/A
Dahuasecurity » N52b5p Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:n52b5p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » N52b5p » Version: N/A
Dahuasecurity » N52b3p Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:n52b3p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » N52b3p » Version: N/A
Dahuasecurity » N54b2p Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:n54b2p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » N54b2p » Version: N/A
Dahuasecurity » Ipc-hdbw1320e-w Firmware
Versions before (<) 2019-12
cpe:2.3:o:dahuasecurity:ipc-hdbw1320e-w_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Dahuasecurity » Ipc-hdbw1320e-w » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2020-9502

EPSS FAQ

0.52%

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

~ 64 %

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

CVSS scores for CVE-2020-9502

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	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2020-9502

CWE-330 Use of Insufficiently Random Values

The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-9502

https://www.dahuasecurity.com/support/cybersecurity/details/777

Security Advisory –Session ID predictable vulnerability found in some Dahua products
Vendor Advisory

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Vulnerability Details : CVE-2020-9502

Products affected by CVE-2020-9502

Exploit prediction scoring system (EPSS) score for CVE-2020-9502

CVSS scores for CVE-2020-9502

CWE ids for CVE-2020-9502

References for CVE-2020-9502