Linux Kernel eBPF out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.9$5k-$25k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel. The affected element is an unknown function of the component eBPF. This manipulation causes out-of-bounds write. This vulnerability appears as CVE-2021-4204. The attack may be initiated remotely. There is no available exploit. It is recommended to change the configuration settings.

Detailsinfo

A vulnerability has been found in Linux Kernel (Operating System) (affected version unknown) and classified as critical. Affected by this vulnerability is an unknown functionality of the component eBPF. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An out-of-bounds (OOB) memory access flaw was found in the Linux kernel's eBPF due to an Improper Input Validation. This flaw allows a local attacker with a special privilege to crash the system or leak internal information.

The weakness was presented 08/24/2022. It is possible to read the advisory at access.redhat.com. This vulnerability is known as CVE-2021-4204 since 01/11/2022. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 11/26/2024).

The vulnerability scanner Nessus provides a plugin with the ID 211841 (RHEL 8 : kernel (RHSA-2024:10262)), which helps to determine the existence of the flaw in a target environment.

It is possible to mitigate the problem by applying the configuration setting .

The vulnerability is also documented in the vulnerability database at Tenable (211841). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

VulDB Base Score: 8.8
VulDB Temp Score: 8.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.1
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / 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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Nessus ID: 211841
Nessus Name: RHEL 8 : kernel (RHSA-2024:10262)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Config
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/11/2022 🔍
08/24/2022 +224 days 🔍
08/24/2022 +0 days 🔍
11/26/2024 +825 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: access.redhat.com
Status: Confirmed

CVE: CVE-2021-4204 (🔍)
GCVE (CVE): GCVE-0-2021-4204
GCVE (VulDB): GCVE-100-207103

Entryinfo

Created: 08/24/2022 22:46
Updated: 11/26/2024 19:51
Changes: 08/24/2022 22:46 (39), 09/25/2022 13:41 (11), 11/26/2024 19:51 (16)
Complete: 🔍
Cache ID: 216::103

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

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