PT-2017-18626 · Linux+3 · Linux Kernel+3

Johan Hovold · Published 2017-03-20 · Updated 2019-04-16 · CVE-2017-8924

Positive Technologies (AI Summary)

CVSS v3.1

4.6

Medium

Base vector

AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 4.10.4

Description The issue allows local users to obtain sensitive information from uninitialized kernel memory. This is achieved by using a crafted USB device, posing as an io ti USB serial device, to trigger an integer underflow in the edge bulk in callback function. The sensitive information can be found in the dmesg ringbuffer and syslog.

Recommendations For Linux kernel versions prior to 4.10.4, update to version 4.10.4 or later to resolve the issue. As a temporary workaround, consider restricting access to the edge bulk in callback function in the drivers/usb/serial/io ti.c file until a patch is available. Avoid using crafted USB devices that could trigger the integer underflow.

Fix

Integer Underflow

Weakness Enumeration

CWE-191

Related Identifiers

ALT-PU-2017-1313

ALT-PU-2018-1991

CVE-2017-8924

DLA-993-1

DSA-3886-1

SUSE-SU-2017:1853-1

SUSE-SU-2017:2342-1

SUSE-SU-2017:2389-1

SUSE-SU-2017:2525-1

SUSE-SU-2017:2908-1

SUSE-SU-2017:2920-1

USN-3359-1

USN-3360-1

USN-3360-2

USN-3361-1

Affected Products

Alt Linux

Linux Kernel

Suse

Ubuntu

References · 556

• https://github.com/torvalds/linux/commit/654b404f2a222f918af9b0cd18ad469d0c941a8e · Patch
• https://linux.oracle.com/errata/ELSA-2020-5879.html · Vendor Advisory
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=654b404f2a222f918af9b0cd18ad469d0c941a8e · Patch
• https://ubuntu.com/security/notices/USN-3361-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2017-8924 · Security Note
• https://ubuntu.com/security/CVE-2017-5546 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-2584 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-3359-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-9755 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-2596 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-9150 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-7472 · Vendor Advisory
• https://ubuntu.com/security/CVE-2015-8964 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-8405 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-3886-1 · Vendor Advisory