Vulnerability 12893 - CERT Civis.Net

Vulnerability Name:

CCN-12893

Published:

2003-08-10

Updated:

2003-08-10

Summary:

FreeBSD is vulnerable to a denial of service. Signals handle asynchronous events and are assigned a positive number. Many mechanisms in FreeBSD, such as system calls and device drivers, fail to validate the signal number. A local attacker could cause a negative or out-of-range signal number to be sent, which would cause the system to crash.

CVSS v3 Severity:

6.2 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

CVSS v2 Severity:

4.9 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Complete