VDB-94484 · CVE-2016-9031 · BID 94921

Joyent SmartOS 20161110T013148Z Hyprlofs integer overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.1	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in Joyent SmartOS 20161110T013148Z. Impacted is an unknown function of the component Hyprlofs. Such manipulation leads to integer overflow. This vulnerability is traded as CVE-2016-9031. An attack has to be approached locally. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Joyent SmartOS 20161110T013148Z (Operating System). Affected by this issue is an unknown code block of the component Hyprlofs. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An exploitable integer overflow exists in the Joyent SmartOS 20161110T013148Z Hyprlofs file system. The vulnerability is present in the Ioctl system call with the command HYPRLOFS_ADD_ENTRIES when dealing with 32-bit file systems. An attacker can craft an input that can cause a kernel panic and potentially be leveraged into a full privilege escalation vulnerability. This vulnerability is distinct from CVE-2016-8733.

The bug was discovered 12/12/2016. The weakness was shared 12/14/2016 by Tyler Bohan with Cisco Talos (Website). The advisory is shared for download at securityfocus.com. This vulnerability is handled as CVE-2016-9031 since 10/26/2016. The exploitation is known to be easy. The attack needs to be approached locally. The requirement for exploitation is a simple authentication. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 94921†). The entries VDB-94488, VDB-94487, VDB-94486 and VDB-94485 are related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Operating System

Vendor

Joyent

Name

SmartOS

Version

20161110T013148Z

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 8.1

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

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 7.8
CNA Vector (Talos): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/26/2016 🔍
12/12/2016 +47 days 🔍
12/14/2016 +2 days 🔍
12/14/2016 +0 days 🔍
12/15/2016 +1 days 🔍
12/15/2016 +0 days 🔍
10/08/2022 +2123 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Researcher: Tyler Bohan
Organization: Cisco Talos
Status: Not defined

CVE: CVE-2016-9031 (🔍)
GCVE (CVE): GCVE-0-2016-9031
GCVE (VulDB): GCVE-100-94484
SecurityFocus: 94921 - Joyent SmartOS CVE-2016-9031 Local Integer Overflow Vulnerability

See also: 🔍

Entryinfo

Created: 12/15/2016 10:30
Updated: 10/08/2022 15:25
Changes: 12/15/2016 10:30 (60), 07/07/2019 20:40 (6), 10/08/2022 15:25 (13)
Complete: 🔍
Cache ID: 216::103