Linux Kernel up to 4.10.3 USB Device io_ti.c edge_bulk_in_callback integer underflow

CVSS Meta Temp Score
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3.9$0-$5k0.96

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel up to 4.10.3. The affected element is the function edge_bulk_in_callback of the file drivers/usb/serial/io_ti.c of the component USB Device Handler. Performing a manipulation results in integer underflow. This vulnerability is reported as CVE-2017-8924. The attack requires a local approach. No exploit exists. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 4.10.3 (Operating System). This affects the function edge_bulk_in_callback of the file drivers/usb/serial/io_ti.c of the component USB Device Handler. The manipulation with an unknown input leads to a integer underflow vulnerability. CWE is classifying the issue as CWE-191. The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result. This is going to have an impact on confidentiality. The summary by CVE is:

The edge_bulk_in_callback function in drivers/usb/serial/io_ti.c in the Linux kernel before 4.10.4 allows local users to obtain sensitive information (in the dmesg ringbuffer and syslog) from uninitialized kernel memory by using a crafted USB device (posing as an io_ti USB serial device) to trigger an integer underflow.

The bug was discovered 05/12/2017. The weakness was disclosed 05/12/2017 as confirmed git commit (GIT Repository). The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2017-8924 since 05/12/2017. An attack has to be approached locally. A authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 100876 (Debian DLA-993-2 : linux regression update (Stack Clash)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176063 (Debian Security Update for Linux Kernel (DSA 3886-1) (Stack Clash)).

Upgrading to version 4.10.4 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (100876) and SecurityFocus (BID 98451†). The entries VDB-101218, VDB-101174, VDB-101233 and VDB-101819 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.9
VulDB Meta Temp Score: 3.9

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.6
NVD Vector: 🔍

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 underflow
CWE: CWE-191 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 100876
Nessus Name: Debian DLA-993-2 : linux regression update (Stack Clash)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703886
OpenVAS Name: Debian Security Advisory DSA 3886-1 (linux - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Upgrade: Kernel 4.10.4
Patch: git.kernel.org

Timelineinfo

05/12/2017 🔍
05/12/2017 +0 days 🔍
05/12/2017 +0 days 🔍
05/12/2017 +0 days 🔍
05/12/2017 +0 days 🔍
05/13/2017 +1 days 🔍
06/20/2017 +38 days 🔍
06/27/2017 +7 days 🔍
12/06/2022 +1988 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 654b404f2a222f918af9b0cd18ad469d0c941a8e
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-8924 (🔍)
GCVE (CVE): GCVE-0-2017-8924
GCVE (VulDB): GCVE-100-101217

OVAL: 🔍

SecurityFocus: 98451
OSVDB: - CVE-2017-8924 - Linux - Integer Underflow Issue

See also: 🔍

Entryinfo

Created: 05/13/2017 08:45
Updated: 12/06/2022 12:35
Changes: 05/13/2017 08:45 (81), 09/26/2020 11:44 (6), 12/06/2022 12:35 (4)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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