Integer underflow in Debian Linux - CVE-2017-8924
Published: May 13, 2017 / Updated: August 8, 2020
Vulnerability identifier: #VU38997
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2017-8924
CWE-ID: CWE-191
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Debian
Affected software:
Debian Linux
Debian Linux
Detailed vulnerability description
The vulnerability allows a local non-authenticated attacker to gain access to sensitive information.
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.
How to mitigate CVE-2017-8924
Install update from vendor's website.
Sources
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=654b404f2a222f918af9b0cd18ad469d0c941a8e
- http://www.debian.org/security/2017/dsa-3886
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.10.4
- http://www.securityfocus.com/bid/98451
- https://github.com/torvalds/linux/commit/654b404f2a222f918af9b0cd18ad469d0c941a8e