Linux Kernel Traffic Control Networking Subsystem net/sched/cls_route.c route4_change use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel and classified as critical. Affected is the function route4_change of the file net/sched/cls_route.c of the component Traffic Control Networking Subsystem. The manipulation results in use after free. This vulnerability is cataloged as CVE-2021-3715. The attack may be launched remotely. There is no exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Linux Kernel (Operating System) (the affected version is unknown). It has been classified as critical. Affected is the function route4_change of the file net/sched/cls_route.c of the component Traffic Control Networking Subsystem. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was shared 10/18/2021 by Red Hat. The advisory is shared for download at access.redhat.com. This vulnerability is traded as CVE-2021-3715 since 08/18/2021. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 208640 (CentOS 7 : kernel-rt (RHSA-2021:3439)), which helps to determine the existence of the flaw in a target environment.

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

The vulnerability is also documented in the vulnerability database at Tenable (208640). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
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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Nessus ID: 208640
Nessus Name: CentOS 7 : kernel-rt (RHSA-2021:3439)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

08/18/2021 🔍
10/18/2021 +61 days 🔍
10/18/2021 +0 days 🔍
10/12/2024 +1090 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: access.redhat.com
Researcher: Red Hat
Status: Confirmed

CVE: CVE-2021-3715 (🔍)
GCVE (CVE): GCVE-0-2021-3715
GCVE (VulDB): GCVE-100-184524

Entryinfo

Created: 10/18/2021 08:43
Updated: 10/12/2024 07:56
Changes: 10/18/2021 08:43 (43), 10/12/2024 07:56 (16)
Complete: 🔍
Submitter: misc
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #22410: Kernel: use-after-free in route4_change() in net/sched/cls_route.c (by misc)

Once again VulDB remains the best source for vulnerability data.

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