ZyXEL NR7101 1.00 HTTP Request buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability has been found in ZyXEL NR7101 1.00 and classified as critical. This vulnerability affects unknown code of the component HTTP Request Handler. This manipulation causes buffer overflow. This vulnerability is registered as CVE-2023-27989. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in ZyXEL NR7101 1.00. It has been declared as critical. Affected by this vulnerability is an unknown part of the component HTTP Request Handler. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

A buffer overflow vulnerability in the CGI program of the Zyxel NR7101 firmware versions prior to V1.00(ABUV.8)C0 could allow a remote authenticated attacker to cause denial of service (DoS) conditions by sending a crafted HTTP request to a vulnerable device.

The weakness was published 06/05/2023. It is possible to read the advisory at zyxel.com. This vulnerability is known as CVE-2023-27989 since 03/09/2023. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 1.00(ABUV.8)C0 eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (Zyxel Corporation): 🔍

CVSSv2info

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

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / 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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: NR7101 1.00(ABUV.8)C0

Timelineinfo

03/09/2023 🔍
06/05/2023 +87 days 🔍
06/05/2023 +0 days 🔍
06/05/2023 +0 days 🔍

Sourcesinfo

Vendor: zyxel.com

Advisory: zyxel.com
Status: Confirmed

CVE: CVE-2023-27989 (🔍)
GCVE (CVE): GCVE-0-2023-27989
GCVE (VulDB): GCVE-100-230695

Entryinfo

Created: 06/05/2023 14:47
Changes: 06/05/2023 14:47 (50)
Complete: 🔍
Cache ID: 216::103

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