Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2020-25583

Severity CVSS v4.0:
Pending analysis
Type:
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Publication date:
29/03/2021
Last modified:
03/06/2021

Description

In FreeBSD 12.2-STABLE before r368250, 11.4-STABLE before r368253, 12.2-RELEASE before p1, 12.1-RELEASE before p11 and 11.4-RELEASE before p5 when processing a DNSSL option, rtsold(8) decodes domain name labels per an encoding specified in RFC 1035 in which the first octet of each label contains the label's length. rtsold(8) did not validate label lengths correctly and could overflow the destination buffer.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.80 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
9.80
Severity 3.x
CRITICAL
Vector 2.0
AV:N/AC:L/Au:N/C:C/I:C/A:C CVSS v2.0 Severity and Metrics:

Base Score: 10.00 HIGH
Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete

Base Score 2.0
10.00
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:freebsd:freebsd:11.3:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.3:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.3:p10:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.3:p11:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.3:p12:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.3:p13:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.3:p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.3:p3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.3:p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.3:p5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.3:p6:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.3:p7:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.3:p8:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.3:p9:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.4:-:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools