Linux Kernel up to 4.9 CVE-2016-9576 Fix block/bsg.c use after free

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 4.9. The impacted element is an unknown function of the file block/bsg.c of the component CVE-2016-9576 Fix. The manipulation leads to use after free. This vulnerability is traded as CVE-2016-10088. An attack has to be approached locally. There is no exploit available.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.9 (Operating System) and classified as problematic. This issue affects an unknown functionality of the file block/bsg.c of the component CVE-2016-9576 Fix. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The sg implementation in the Linux kernel through 4.9 does not properly restrict write operations in situations where the KERNEL_DS option is set, which allows local users to read or write to arbitrary kernel memory locations or cause a denial of service (use-after-free) by leveraging access to a /dev/sg device, related to block/bsg.c and drivers/scsi/sg.c. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-9576.

The weakness was shared 12/30/2016 (Website). It is possible to read the advisory at kernel.org. The identification of this vulnerability is CVE-2016-10088. Attacking locally is a requirement. The successful exploitation needs a simple authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/27/2022).

The vulnerability scanner Nessus provides a plugin with the ID 96188 (Debian DLA-772-1 : linux security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169706 (SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2017:0437-1)).

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 databases at Tenable (96188), SecurityFocus (BID 95169†) and SecurityTracker (ID 1037538†). The entries VDB-11509, VDB-69017, VDB-75570 and VDB-93503 are related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.0
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
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: 96188
Nessus Name: Debian DLA-772-1 : linux security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 871165
OpenVAS Name: RedHat Update for kernel RHSA-2017:1842-01
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

12/30/2016 🔍
12/30/2016 +0 days 🔍
12/30/2016 +0 days 🔍
12/31/2016 +1 days 🔍
12/31/2016 +0 days 🔍
10/27/2022 +2126 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2017:1842
Status: Confirmed

CVE: CVE-2016-10088 (🔍)
GCVE (CVE): GCVE-0-2016-10088
GCVE (VulDB): GCVE-100-94739
SecurityFocus: 95169
SecurityTracker: 1037538 - Linux Kernel sg_write() and bsg_write() Functions Let Local Users Obtain Root Privileges

See also: 🔍

Entryinfo

Created: 12/31/2016 14:02
Updated: 10/27/2022 08:22
Changes: 12/31/2016 14:02 (43), 05/17/2018 23:27 (23), 10/27/2022 08:13 (4), 10/27/2022 08:17 (12), 10/27/2022 08:22 (1)
Complete: 🔍
Cache ID: 216:8EC:103

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