VDB-112692 · CVE-2018-6374 · BID 102908

Pulse Secure Desktop Client up to 5.2R9.0/5.3R4.1 on Linux GUI certificate validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Pulse Secure Desktop Client up to 5.2R9.0/5.3R4.1 on Linux. It has been declared as critical. This affects an unknown function of the component GUI. The manipulation results in certificate validation. This vulnerability is reported as CVE-2018-6374. The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Pulse Secure Desktop Client up to 5.2R9.0/5.3R4.1 on Linux. Affected is some unknown processing of the component GUI. The manipulation with an unknown input leads to a certificate validation vulnerability. CWE is classifying the issue as CWE-295. The product does not validate, or incorrectly validates, a certificate. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The GUI component (aka PulseUI) in Pulse Secure Desktop Linux clients before PULSE5.2R9.2 and 5.3.x before PULSE5.3R4.2 does not perform strict SSL Certificate Validation. This can lead to the manipulation of the Pulse Connection set.

The bug was discovered 01/28/2018. The weakness was disclosed 01/31/2018 by Will Dormann (Website). The advisory is shared for download at kb.pulsesecure.net. This vulnerability is traded as CVE-2018-6374 since 01/28/2018. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1587.003.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 5.2R9.2 or 5.3R4.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 102908†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.8

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
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: Certificate validation
CWE: CWE-295 / CWE-287
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Desktop Client 5.2R9.2/5.3R4.2

Timelineinfo

01/28/2018 🔍
01/28/2018 +0 days 🔍
01/30/2018 +2 days 🔍
01/31/2018 +1 days 🔍
01/31/2018 +0 days 🔍
02/01/2018 +1 days 🔍
12/31/2019 +698 days 🔍

Sourcesinfo

Advisory: kb.pulsesecure.net
Researcher: Will Dormann
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-6374 (🔍)
GCVE (CVE): GCVE-0-2018-6374
GCVE (VulDB): GCVE-100-112692
SecurityFocus: 102908 - Pulse Secure Desktop Linux Client CVE-2018-6374 Man in the Middle Security Bypass Vulnerability

Entryinfo

Created: 02/01/2018 07:58
Updated: 12/31/2019 16:49
Changes: 02/01/2018 07:58 (62), 12/31/2019 16:49 (5)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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