VDB-101217 · CVE-2017-8924 · BID 98451

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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CTI Interest Score
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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†).







CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Meta Base Score: 3.9
VulDB Meta Temp Score: 3.9

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
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NVD Base Score: 4.6
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Class: Integer underflow
CWE: CWE-191 / CWE-189

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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

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

Threat Intelligenceinfo

Interest: 🔍
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Recommended: Patch
Status: 🔍

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Upgrade: Kernel 4.10.4
Patch: git.kernel.org


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 🔍


Vendor: kernel.org

Advisory: 654b404f2a222f918af9b0cd18ad469d0c941a8e
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-8924 (🔍)

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


Created: 05/13/2017 08:45 AM
Updated: 12/06/2022 12:35 PM
Changes: 05/13/2017 08:45 AM (81), 09/26/2020 11:44 AM (6), 12/06/2022 12:35 PM (4)
Complete: 🔍
Cache ID: 35:8B5:40


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