Linux Kernel up to 4.4 kernel/bpf/verifier.c adjust_branches Kernel Memory information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 4.4 and classified as problematic. This vulnerability affects the function adjust_branches of the file kernel/bpf/verifier.c. Executing a manipulation can lead to information disclosure (Kernel Memory). The identification of this vulnerability is CVE-2016-2383. The attack can only be executed locally. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 4.4 (Operating System). This vulnerability affects the function adjust_branches of the file kernel/bpf/verifier.c. The manipulation with an unknown input leads to a information disclosure vulnerability (Kernel Memory). The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The adjust_branches function in kernel/bpf/verifier.c in the Linux kernel before 4.5 does not consider the delta in the backward-jump case, which allows local users to obtain sensitive information from kernel memory by creating a packet filter and then loading crafted BPF instructions.

The weakness was shared 04/27/2016 (Website). The advisory is available at github.com. This vulnerability was named CVE-2016-2383 since 02/13/2016. Local access is required to approach this attack. A single authentication is needed for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 89966 (Amazon Linux AMI : kernel (ALAS-2016-669)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196444 (Ubuntu Security Notification for Linux Vulnerabilities (USN-2947-1)).

Upgrading to version 4.5 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (89966). The entry VDB-82962 is related to this item. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.5

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Name: Kernel Memory
Class: Information disclosure / Kernel Memory
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 89966
Nessus Name: Amazon Linux AMI : kernel (ALAS-2016-669)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 65888
OpenVAS Name: Ubuntu Update for linux-raspi2 USN-2947-3
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.5
Patch: git.kernel.org

Timelineinfo

02/13/2016 🔍
03/15/2016 +31 days 🔍
03/16/2016 +1 days 🔍
04/27/2016 +41 days 🔍
04/27/2016 +0 days 🔍
04/28/2016 +1 days 🔍
07/27/2022 +2281 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-2947-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-2383 (🔍)
GCVE (CVE): GCVE-0-2016-2383
GCVE (VulDB): GCVE-100-82954
See also: 🔍

Entryinfo

Created: 04/28/2016 10:23
Updated: 07/27/2022 08:01
Changes: 04/28/2016 10:23 (60), 10/29/2018 05:49 (17), 07/27/2022 08:01 (4)
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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