Asus RT-AX56U 3.0.0.4.386.44266 strcat stack-based overflow

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

Summaryinfo

A vulnerability was found in Asus RT-AX56U 3.0.0.4.386.44266. It has been rated as critical. The impacted element is the function strcat. This manipulation causes stack-based overflow. This vulnerability is tracked as CVE-2021-40556. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in Asus RT-AX56U 3.0.0.4.386.44266 and classified as critical. Affected by this vulnerability is the function strcat. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A stack overflow vulnerability exists in the httpd service in ASUS RT-AX56U Router Version 3.0.0.4.386.44266. This vulnerability is caused by the strcat function called by "caupload" input handle function allowing the user to enter 0xFFFF bytes into the stack. This vulnerability allows an attacker to execute commands remotely. The vulnerability requires authentication.

The weakness was disclosed 10/06/2022. The advisory is shared at x1ng.top. This vulnerability is known as CVE-2021-40556 since 09/07/2021. Technical details are known, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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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

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VulDB Base Score: 🔍
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VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / 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

09/07/2021 🔍
10/06/2022 +394 days 🔍
10/06/2022 +0 days 🔍
10/30/2022 +24 days 🔍

Sourcesinfo

Vendor: asus.com

Advisory: x1ng.top
Status: Not defined

CVE: CVE-2021-40556 (🔍)
GCVE (CVE): GCVE-0-2021-40556
GCVE (VulDB): GCVE-100-210217

Entryinfo

Created: 10/06/2022 22:36
Updated: 10/30/2022 15:46
Changes: 10/06/2022 22:36 (38), 10/30/2022 15:46 (11)
Complete: 🔍
Cache ID: 216::103

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