Discuz! DiscuzX 3.4 WeChat Login plugin.php wxopenid 7pk security

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Discuz! DiscuzX 3.4. It has been rated as critical. Affected by this vulnerability is an unknown functionality of the file plugin.php of the component WeChat Login. This manipulation of the argument wxopenid as part of Query String causes 7pk security. The identification of this vulnerability is CVE-2018-20423. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical was found in Discuz! DiscuzX 3.4. Affected by this vulnerability is an unknown function of the file plugin.php of the component WeChat Login. The manipulation of the argument wxopenid as part of a Query String leads to a 7pk security vulnerability. The CWE definition for the vulnerability is CWE-254. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Discuz! DiscuzX 3.4, when WeChat login is enabled, allows remote attackers to bypass a "disabled registration" setting by adding a non-existing wxopenid value to the plugin.php ac=wxregister query string.

The bug was discovered 12/11/2018. The weakness was shared 12/24/2018 (Website). It is possible to read the advisory at gitee.com. This vulnerability is known as CVE-2018-20423 since 12/23/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1211 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 12 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:plugin.php 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 entries VDB-128358 and VDB-128360 are related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.7

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: 7pk security
CWE: CWE-254
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
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

12/11/2018 🔍
12/23/2018 +12 days 🔍
12/23/2018 +0 days 🔍
12/24/2018 +1 days 🔍
12/24/2018 +0 days 🔍
04/23/2020 +486 days 🔍

Sourcesinfo

Advisory: gitee.com
Status: Not defined

CVE: CVE-2018-20423 (🔍)
GCVE (CVE): GCVE-0-2018-20423
GCVE (VulDB): GCVE-100-128359
See also: 🔍

Entryinfo

Created: 12/24/2018 09:25
Updated: 04/23/2020 18:59
Changes: 12/24/2018 09:25 (60), 04/23/2020 18:59 (1)
Complete: 🔍
Cache ID: 216::103

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

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