Zscaler ZIA prior 6.2r.290 SNI certificate validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Zscaler ZIA and classified as critical. Affected by this vulnerability is an unknown functionality of the component SNI Handler. Such manipulation leads to certificate validation. This vulnerability is traded as CVE-2023-28807. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Zscaler ZIA. It has been rated as problematic. Affected by this issue is an unknown code of the component SNI Handler. The manipulation with an unknown input leads to a certificate validation vulnerability. Using CWE to declare the problem leads to CWE-295. The product does not validate, or incorrectly validates, a certificate. Impacted is integrity. CVE summarizes:

In Zscaler Internet Access (ZIA) a mismatch between Connect Host and Client Hello's Server Name Indication (SNI) enables attackers to evade network security controls by hiding their communications within legitimate traffic.

The weakness was shared 01/31/2024. The advisory is available at help.zscaler.com. This vulnerability is handled as CVE-2023-28807 since 03/23/2023. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1587.003 by the MITRE ATT&CK project.

Upgrading to version 6.2r.290 eliminates this vulnerability.

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Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 5.1
CNA Vector (Zscaler, Inc.): 🔍

CVSSv2info

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

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
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: 🔍

Upgrade: ZIA 6.2r.290

Timelineinfo

03/23/2023 🔍
01/31/2024 +314 days 🔍
01/31/2024 +0 days 🔍
02/22/2024 +22 days 🔍

Sourcesinfo

Advisory: help.zscaler.com
Status: Confirmed

CVE: CVE-2023-28807 (🔍)
GCVE (CVE): GCVE-0-2023-28807
GCVE (VulDB): GCVE-100-252494

Entryinfo

Created: 01/31/2024 20:44
Updated: 02/22/2024 16:32
Changes: 01/31/2024 20:44 (48), 02/22/2024 16:32 (12)
Complete: 🔍
Cache ID: 216::103

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