Lenovo System Update prior 5.07.0106 toctou

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Lenovo System Update. It has been rated as critical. Impacted is an unknown function. This manipulation causes toctou. This vulnerability is tracked as CVE-2020-8342. The attack is restricted to local execution. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Lenovo System Update. It has been declared as critical. Affected by this vulnerability is an unknown function. The manipulation with an unknown input leads to a toctou vulnerability. The CWE definition for the vulnerability is CWE-367. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A race condition vulnerability was reported in Lenovo System Update prior to version 5.07.0106 that could allow escalation of privilege.

The weakness was disclosed 09/15/2020 (Website). It is possible to read the advisory at support.lenovo.com. This vulnerability is known as CVE-2020-8342 since 01/28/2020. Attacking locally is a requirement. The successful exploitation requires a single authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 5.07.0106 eliminates this vulnerability.

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

Productinfo

Vendor

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License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 5.9

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.3
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Toctou
CWE: CWE-367 / CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: System Update 5.07.0106

Timelineinfo

01/28/2020 🔍
09/15/2020 +231 days 🔍
09/16/2020 +1 days 🔍
09/16/2020 +0 days 🔍

Sourcesinfo

Vendor: lenovo.com

Advisory: support.lenovo.com
Status: Not defined

CVE: CVE-2020-8342 (🔍)
GCVE (CVE): GCVE-0-2020-8342
GCVE (VulDB): GCVE-100-161287

Entryinfo

Created: 09/16/2020 09:45
Updated: 09/16/2020 09:50
Changes: 09/16/2020 09:45 (37), 09/16/2020 09:50 (11)
Complete: 🔍
Cache ID: 216::103

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