Linux Kernel net/llc/af_llc.c llc_cmsg_rcv Info information disclosure

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8.0$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Linux Kernel. Affected is the function llc_cmsg_rcv of the file net/llc/af_llc.c. Executing a manipulation of the argument Info can lead to information disclosure. This vulnerability is registered as CVE-2016-4485. 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 Linux Kernel (Operating System) (affected version unknown). This vulnerability affects the function llc_cmsg_rcv of the file net/llc/af_llc.c. The manipulation of the argument info with an unknown input leads to a information disclosure vulnerability. 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 llc_cmsg_rcv function in net/llc/af_llc.c in the Linux kernel before 4.5.5 does not initialize a certain data structure, which allows attackers to obtain sensitive information from kernel stack memory by reading a message.

The weakness was published 05/04/2016 as confirmed mailinglist post (oss-sec). The advisory is available at seclists.org. This vulnerability was named CVE-2016-4485 since 05/04/2016. The exploitation appears to be easy. Local access is required to approach this attack. No form of authentication is required for a successful 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 91425 (Ubuntu 14.04 LTS : linux vulnerabilities (USN-2989-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196488 (Ubuntu Security Notification for Linux Vulnerabilities (USN-2989-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability. The vulnerability will be addressed with the following lines of code:

memset(&info, 0, sizeof(info));

The vulnerability is also documented in the databases at X-Force (113010), Tenable (91425) and SecurityFocus (BID 90015†). Similar entries are available at VDB-81887, VDB-83140, VDB-83141 and VDB-83148. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.7
VulDB Meta Temp Score: 8.0

VulDB Base Score: 9.8
VulDB Temp Score: 8.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 91425
Nessus Name: Ubuntu 14.04 LTS : linux vulnerabilities (USN-2989-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 840909
OpenVAS Name: Ubuntu Update for linux-lts-xenial USN-3005-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Patch: git.kernel.org

Timelineinfo

05/04/2016 🔍
05/04/2016 +0 days 🔍
05/04/2016 +0 days 🔍
05/10/2016 +6 days 🔍
05/23/2016 +13 days 🔍
06/01/2016 +9 days 🔍
06/01/2016 +0 days 🔍
08/18/2022 +2269 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-2989-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-4485 (🔍)
GCVE (CVE): GCVE-0-2016-4485
GCVE (VulDB): GCVE-100-87130

OVAL: 🔍

X-Force: 113010 - Linux Kernel net/llc/af_llc.c information disclosure
SecurityFocus: 90015 - Linux Kernel 'net/llc/af_llc.c' Local Information Disclosure Vulnerability

See also: 🔍

Entryinfo

Created: 05/10/2016 10:39
Updated: 08/18/2022 06:52
Changes: 05/10/2016 10:39 (75), 11/23/2018 10:46 (13), 08/18/2022 06:52 (3)
Complete: 🔍
Cache ID: 216:EE1:103

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

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