ZyXEL PMG2005-T20B cgi-bin/login.asp uid buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability was found in ZyXEL PMG2005-T20B. It has been classified as critical. The affected element is an unknown function of the file cgi-bin/login.asp. This manipulation of the argument uid causes buffer overflow. This vulnerability appears as CVE-2023-43314. The attack may be initiated remotely. In addition, an exploit is available.

Detailsinfo

A vulnerability has been found in ZyXEL PMG2005-T20B (Router Operating System) (unknown version) and classified as critical. Affected by this vulnerability is an unknown code block of the file cgi-bin/login.asp. The manipulation of the argument uid 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:

** UNSUPPORTED WHEN ASSIGNED **The buffer overflow vulnerability in the Zyxel PMG2005-T20B firmware version V1.00(ABNK.2)b11_C0 could allow an unauthenticated attacker to cause a denial of service condition via a crafted uid.

The weakness was presented 09/28/2023. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2023-43314 since 09/18/2023. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept. By approaching the search of inurl:cgi-bin/login.asp it is possible to find vulnerable targets with Google Hacking.

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

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-47733). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.0

VulDB Base Score: 6.5
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector (MITRE): 🔍

CVSSv2info

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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: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍
Google Hack: 🔍

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

09/18/2023 🔍
09/28/2023 +10 days 🔍
09/28/2023 +0 days 🔍
02/26/2026 +882 days 🔍

Sourcesinfo

Vendor: zyxel.com

Advisory: github.com
Status: Not defined

CVE: CVE-2023-43314 (🔍)
GCVE (CVE): GCVE-0-2023-43314
GCVE (VulDB): GCVE-100-240763
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/28/2023 07:27
Updated: 02/26/2026 08:40
Changes: 09/28/2023 07:27 (42), 10/21/2023 11:55 (21), 08/02/2024 22:39 (19), 02/05/2026 04:39 (2), 02/26/2026 08:40 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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