Zyxel ATP/USG FLEX/VPN PPPoE Configuration format string

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.8$5k-$25k0.00

Summaryinfo

A vulnerability has been found in Zyxel ATP, USG FLEX and VPN and classified as critical. This affects an unknown part of the component PPPoE Configuration Handler. The manipulation leads to format string. This vulnerability is referenced as CVE-2023-33011. The attack needs to be initiated within the local network. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Zyxel ATP, USG FLEX and VPN (Network Encryption Software) (the affected version unknown). This issue affects an unknown part of the component PPPoE Configuration Handler. The manipulation with an unknown input leads to a format string vulnerability. Using CWE to declare the problem leads to CWE-134. The product uses a function that accepts a format string as an argument, but the format string originates from an external source. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A format string vulnerability in the Zyxel ATP series firmware versions 5.10 through 5.36 Patch 2, USG FLEX series firmware versions 5.00 through 5.36 Patch 2, USG FLEX 50(W) series firmware versions 5.10 through 5.36 Patch 2, USG20(W)-VPN series firmware versions 5.10 through 5.36 Patch 2, and VPN series firmware versions 5.00 through 5.36 Patch 2, could allow an unauthenticated, LAN-based attacker to execute some OS commands by using a crafted PPPoE configuration on an affected device when the cloud management mode is enabled.

The weakness was published 07/18/2023. It is possible to read the advisory at zyxel.com. The identification of this vulnerability is CVE-2023-33011 since 05/17/2023. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/18/2023).

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

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

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.8

VulDB Base Score: 8.8
VulDB Temp Score: 8.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector (Zyxel Corporation): 🔍

CVSSv2info

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

Exploitinginfo

Class: Format string
CWE: CWE-134 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

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

05/17/2023 🔍
07/18/2023 +62 days 🔍
07/18/2023 +0 days 🔍
07/18/2023 +0 days 🔍

Sourcesinfo

Vendor: zyxel.com

Advisory: zyxel.com
Status: Confirmed

CVE: CVE-2023-33011 (🔍)
GCVE (CVE): GCVE-0-2023-33011
GCVE (VulDB): GCVE-100-234335

Entryinfo

Created: 07/18/2023 09:53
Changes: 07/18/2023 09:53 (48)
Complete: 🔍
Cache ID: 216::103

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