Draytek Vigor 2620/Vigor 2925 user_login.cgi memory corruption

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

Summaryinfo

A vulnerability categorized as critical has been discovered in Draytek Vigor 2620 and Vigor 2925. Impacted is an unknown function of the file user_login.cgi. Executing a manipulation can lead to memory corruption. This vulnerability is handled as CVE-2023-31447. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Draytek Vigor 2620 and Vigor 2925 (Router Operating System) (affected version unknown). It has been declared as critical. This vulnerability affects an unknown functionality of the file user_login.cgi. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

user_login.cgi on Draytek Vigor2620 devices before 3.9.8.4 (and on all versions of Vigor2925 devices) allows attackers to send a crafted payload to modify the content of the code segment, insert shellcode, and execute arbitrary code.

The weakness was released 08/22/2023. This vulnerability was named CVE-2023-31447 since 04/28/2023. There are known technical details, but no exploit is available.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-35755). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

License

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: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Memory corruption
CWE: 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: 🔍

Timelineinfo

04/28/2023 🔍
08/22/2023 +116 days 🔍
08/22/2023 +0 days 🔍
12/24/2025 +855 days 🔍

Sourcesinfo

Status: Confirmed

CVE: CVE-2023-31447 (🔍)
GCVE (CVE): GCVE-0-2023-31447
GCVE (VulDB): GCVE-100-237616
EUVD: 🔍

Entryinfo

Created: 08/22/2023 07:45
Updated: 12/24/2025 23:54
Changes: 08/22/2023 07:45 (38), 10/07/2024 22:13 (26), 12/24/2025 23:54 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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