Double free

2018-08-2119:29:00

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www.prio-n.com

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.3 High

AI Score

Confidence

High

4.6 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.0004 Low

EPSS

Percentile

8.3%

JSON

It was found that the raw midi kernel driver does not protect against concurrent access which leads to a double realloc (double free) in snd_rawmidi_input_params() and snd_rawmidi_output_status() which are part of snd_rawmidi_ioctl() handler in rawmidi.c file. A malicious local attacker could possibly use this for privilege escalation.

CPENameOperatorVersion
ubuntu_linuxeq16.04
ubuntu_linuxeq14.04
ubuntu_linuxeq12.04
ubuntu_linuxeq18.04
debian_linuxeq8.0
debian_linuxeq9.0
enterprise_linux_desktopeq7.0
enterprise_linux_desktopeq6.0
enterprise_linux_servereq7.0
enterprise_linux_servereq6.0

Name	Operator	Version
ubuntu_linux	eq	16.04
ubuntu_linux	eq	14.04
ubuntu_linux	eq	12.04
ubuntu_linux	eq	18.04
debian_linux	eq	8.0
debian_linux	eq	9.0
enterprise_linux_desktop	eq	7.0
enterprise_linux_desktop	eq	6.0
enterprise_linux_server	eq	7.0
enterprise_linux_server	eq	6.0