ZyXEL NR7101 prior 1.15(ACCC.3)C0 Web Server buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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5.6$0-$5k0.00

A vulnerability was found in ZyXEL NR7101 and classified as critical. Affected by this issue is some unknown processing of the component Web Server. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. 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. Impacted is availability. CVE summarizes:

A buffer overflow vulnerability in the parameter of web server in Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an authenticated attacker to cause denial-of-service (DoS) conditions by sending a crafted authorization request.

The weakness was presented 01/11/2023. The advisory is available at zyxel.com. This vulnerability is handled as CVE-2022-43392 since 10/18/2022. The technical details are unknown and an exploit is not available.

Upgrading to version 1.15(ACCC.3)C0 eliminates this vulnerability.

Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.6

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.1
CNA Vector (Zyxel Corporation): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
ATT&CK: Unknown

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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: NR7101 1.15(ACCC.3)C0

Timelineinfo

10/18/2022 🔍
01/11/2023 +85 days 🔍
01/11/2023 +0 days 🔍
01/11/2023 +0 days 🔍

Sourcesinfo

Vendor: zyxel.com

Advisory: zyxel.com
Status: Confirmed

CVE: CVE-2022-43392 (🔍)

Entryinfo

Created: 01/11/2023 07:35 AM
Changes: 01/11/2023 07:35 AM (49)
Complete: 🔍

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