Linux Kernel up to 4.5.4 NM Entry fs/isofs/rock.c get_rock_ridge_filename Kernel Memory information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

A vulnerability classified as critical was found in Linux Kernel up to 4.5.4 (Operating System). This vulnerability affects the function get_rock_ridge_filename of the file fs/isofs/rock.c of the component NM Entry Handler. The manipulation with the input value \0 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 get_rock_ridge_filename function in fs/isofs/rock.c in the Linux kernel before 4.5.5 mishandles NM (aka alternate name) entries containing \0 characters, which allows local users to obtain sensitive information from kernel memory or possibly have unspecified other impact via a crafted isofs filesystem.

The weakness was released 05/23/2016 by Salvatore Bonaccorso (Website). The advisory is shared for download at github.com. This vulnerability was named CVE-2016-4913 since 05/18/2016. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability scanner Nessus provides a plugin with the ID 91463 (Amazon Linux AMI : kernel (ALAS-2016-704)), 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 157849 (Oracle Enterprise Linux Security Update for kernel (ELSA-2018-3083)).

Upgrading to version 4.5.5 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (91463). Entries connected to this vulnerability are available at 81153, 105605, 109511 and 113072.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

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

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 91463
Nessus Name: Amazon Linux AMI : kernel (ALAS-2016-704)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 800225
OpenVAS Name: Ubuntu Update for linux-lts-wily USN-3017-3
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Kernel 4.5.5
Patch: git.kernel.org

Timelineinfo

05/18/2016 🔍
05/18/2016 +0 days 🔍
05/23/2016 +5 days 🔍
05/23/2016 +0 days 🔍
05/24/2016 +1 days 🔍
06/02/2016 +9 days 🔍
06/06/2016 +4 days 🔍
08/22/2022 +2268 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2018:3083
Researcher: Salvatore Bonaccorso
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-4913 (🔍)
OVAL: 🔍

SecurityFocus: 90730 - Linux Kernel 'fs/isofs/rock.c' Local Information Disclosure Vulnerability

See also: 🔍

Entryinfo

Created: 05/24/2016 11:57
Updated: 08/22/2022 09:33
Changes: 05/24/2016 11:57 (73), 12/12/2018 10:14 (15), 08/22/2022 09:33 (5)
Complete: 🔍

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