ZyXEL VMG5313-B30B up to 5.13(ABCJ.6)b3_1127 Privileges FirstIndex permission assignment

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.0$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in ZyXEL VMG5313-B30B up to 5.13(ABCJ.6)b3_1127. Impacted is an unknown function of the component Privileges. Such manipulation of the argument FirstIndex leads to permission assignment. This vulnerability is documented as CVE-2020-24355. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in ZyXEL VMG5313-B30B up to 5.13(ABCJ.6)b3_1127. Affected by this issue is an unknown functionality of the component Privileges. The manipulation of the argument FirstIndex with an unknown input leads to a permission assignment vulnerability. Using CWE to declare the problem leads to CWE-732. The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Zyxel VMG5313-B30B router on firmware 5.13(ABCJ.6)b3_1127, and possibly older versions of firmware are affected by insecure permissions which allows regular and other users to create new users with elevated privileges. This is done by changing "FirstIndex" field in JSON that is POST-ed during account creation. Similar may also be possible with account deletion.

The weakness was released 09/02/2020. This vulnerability is handled as CVE-2020-24355 since 08/13/2020. The attack may be launched remotely. The successful exploitation needs a simple authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/02/2020).

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

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Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 8.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
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: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Permission assignment
CWE: CWE-732 / CWE-275 / CWE-266
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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/13/2020 🔍
09/02/2020 +20 days 🔍
09/02/2020 +0 days 🔍
09/02/2020 +0 days 🔍

Sourcesinfo

Vendor: zyxel.com

Status: Not defined

CVE: CVE-2020-24355 (🔍)
GCVE (CVE): GCVE-0-2020-24355
GCVE (VulDB): GCVE-100-160616

Entryinfo

Created: 09/02/2020 18:20
Updated: 09/02/2020 18:25
Changes: 09/02/2020 18:20 (36), 09/02/2020 18:25 (17)
Complete: 🔍
Cache ID: 216::103

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