VDB-94483 · CVE-2016-8733 · BID 94920

Joyent SmartOS 20161110T013148Z Hyprlofs integer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.5$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Joyent SmartOS 20161110T013148Z. This issue affects some unknown processing of the component Hyprlofs. This manipulation causes integer overflow. This vulnerability appears as CVE-2016-8733. The attack requires local access. There is no available exploit.

Detailsinfo

A vulnerability classified as critical was found in Joyent SmartOS 20161110T013148Z (Operating System). Affected by this vulnerability is an unknown code of the component Hyprlofs. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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 native 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-2016-9031.

The bug was discovered 12/12/2016. The weakness was presented 12/14/2016 by Tyler Bohan with Cisco Talos (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is known as CVE-2016-8733 since 10/17/2016. The exploitation appears to be easy. Attacking locally is a requirement. A single authentication is needed for exploitation. The technical details are unknown and an exploit is not 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 94920†). See VDB-94487, VDB-94486, VDB-94485 and VDB-94484 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.5

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

NVD Base Score: 8.8
NVD Vector: 🔍

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

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/17/2016 🔍
12/12/2016 +56 days 🔍
12/12/2016 +0 days 🔍
12/14/2016 +2 days 🔍
12/14/2016 +0 days 🔍
12/15/2016 +1 days 🔍
10/08/2022 +2123 days 🔍

Sourcesinfo

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

CVE: CVE-2016-8733 (🔍)
GCVE (CVE): GCVE-0-2016-8733
GCVE (VulDB): GCVE-100-94483
SecurityFocus: 94920 - Joyent SmartOS CVE-2016-8733 Integer Overflow Vulnerability

See also: 🔍

Entryinfo

Created: 12/15/2016 10:30
Updated: 10/08/2022 15:19
Changes: 12/15/2016 10:30 (60), 07/07/2019 20:34 (6), 10/08/2022 15:19 (13)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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