CVE-2018-7191

MEDIUM

Description

In the tun subsystem in the Linux kernel before 4.13.14, dev_get_valid_name is not called before register_netdevice. This allows local users to cause a denial of service (NULL pointer dereference and panic) via an ioctl(TUNSETIFF) call with a dev name containing a / character. This is similar to CVE-2013-4343.

References

http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00071.html

http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html

http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00048.html

http://www.securityfocus.com/bid/108380

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1743792

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1748846

https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.14

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0ad646c81b2182f7fa67ec0c8c825e0ee165696d

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5c25f65fd1e42685f7ccd80e0621829c105785d9

https://github.com/torvalds/linux/commit/0ad646c81b2182f7fa67ec0c8c825e0ee165696d

https://github.com/torvalds/linux/commit/5c25f65fd1e42685f7ccd80e0621829c105785d9

Details

Source: MITRE

Published: 2019-05-17

Updated: 2019-05-31

Type: CWE-476

Risk Information

CVSS v2.0

Base Score: 4.9

Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3.0

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM