CVE-2020-13391 : An issue was discovered on Tenda AC6 V1.0 V15.03.05.19_multi

An issue was discovered on Tenda AC6 V1.0 V15.03.05.19_multi_TD01, AC9 V1.0 V15.03.05.19(6318)_CN, AC9 V3.0 V15.03.06.42_multi, AC15 V1.0 V15.03.05.19_multi_TD01, and AC18 V15.03.05.19(6318_)_CN devices. There is a buffer overflow vulnerability in the router's web server -- httpd. While processing the /goform/SetSpeedWan speed_dir parameter for a POST request, a value is directly used in a sprintf to a local variable placed on the stack, which overwrites the return address of a function. An attacker can construct a payload to carry out arbitrary code execution attacks.

Published 2020-05-22 17:15:11

Updated 2020-05-27 19:50:31

Source MITRE

View at NVD, CVE.org

Vulnerability category: Overflow

Products affected by CVE-2020-13391

Tendacn » Ac15 Firmware » Version: V15.03.05.19 Multi Td01
cpe:2.3:o:tendacn:ac15_firmware:v15.03.05.19_multi_td01:*:*:*:*:*:*:*
Matching versions
When used together with: Tendacn » Ac15 » Version: 1.0
Tendacn » Ac9 Firmware » Version: V15.03.05.19(6318)
cpe:2.3:o:tendacn:ac9_firmware:v15.03.05.19\(6318\):*:*:*:*:*:*:*
Matching versions
When used together with: Tendacn » AC9 » Version: 1.0
Tendacn » Ac9 Firmware » Version: V15.03.06.42 Multi
cpe:2.3:o:tendacn:ac9_firmware:v15.03.06.42_multi:*:*:*:*:*:*:*
Matching versions
When used together with: Tendacn » AC9 » Version: 3.0
Tendacn » Ac18 Firmware » Version: V15.03.05.19(6318)
cpe:2.3:o:tendacn:ac18_firmware:v15.03.05.19\(6318\):*:*:*:*:*:*:*
Matching versions
When used together with: Tendacn » Ac18 » Version: N/A
Tendacn » Ac6 Firmware » Version: V15.03.05.19 Multi Td01
cpe:2.3:o:tendacn:ac6_firmware:v15.03.05.19_multi_td01:*:*:*:*:*:*:*
Matching versions
When used together with: Tendacn » AC6 » Version: 1.0

Exploit prediction scoring system (EPSS) score for CVE-2020-13391

EPSS FAQ

0.70%

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

~ 81 %

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

CVSS scores for CVE-2020-13391

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-2020-13391

CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-13391

https://joel-malwarebenchmark.github.io

Joel
Exploit;Third Party Advisory

CVEs referencing this url
https://joel-malwarebenchmark.github.io/blog/2020/04/28/cve-2020-13391-Tenda-vulnerability/

CVE-2020-13391: Tenda Vulnerability - Joel
Exploit;Third Party Advisory

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Vulnerability Details : CVE-2020-13391

Products affected by CVE-2020-13391

Exploit prediction scoring system (EPSS) score for CVE-2020-13391

CVSS scores for CVE-2020-13391

CWE ids for CVE-2020-13391

References for CVE-2020-13391