Shiftfs on Ubuntu Kernel Memory copy_from_user double free

CVSS Meta Temp Score
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CTI Interest Score
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8.0$0-$5k0.00

Summaryinfo

A vulnerability was found in Shiftfs on Ubuntu and classified as problematic. This affects the function copy_from_user of the component Kernel Memory Handler. Executing a manipulation can lead to double free. This vulnerability is registered as CVE-2021-3492. It is possible to launch the attack remotely. No exploit is available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability classified as critical was found in Shiftfs on Ubuntu (the affected version is unknown). This vulnerability affects the function copy_from_user of the component Kernel Memory Handler. The manipulation with an unknown input leads to a double free vulnerability. The CWE definition for the vulnerability is CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was published 04/17/2021 as USN-4917-1. The advisory is available at ubuntu.com. This vulnerability was named CVE-2021-3492. Technical details are known, but there is no available exploit.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.launchpad.net.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.3
VulDB Meta Temp Score: 8.1

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
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: Double free
CWE: CWE-415 / CWE-119
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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.launchpad.net

Timelineinfo

04/09/2021 🔍
04/17/2021 +8 days 🔍
04/17/2021 +0 days 🔍
04/28/2021 +11 days 🔍

Sourcesinfo

Advisory: USN-4917-1
Status: Confirmed

CVE: CVE-2021-3492 (🔍)
GCVE (CVE): GCVE-0-2021-3492
GCVE (VulDB): GCVE-100-173170

Entryinfo

Created: 04/17/2021 16:13
Updated: 04/28/2021 06:32
Changes: 04/17/2021 16:13 (40), 04/23/2021 07:35 (5), 04/23/2021 07:42 (1), 04/28/2021 06:32 (18)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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