CVE-2019-16905

Severity CVSS v4.0:

Pending analysis

Type:

CWE-190 Integer Overflow or Wraparound

Publication date:

09/10/2019

Last modified:

23/04/2025

Description

OpenSSH 7.7 through 7.9 and 8.x before 8.1, when compiled with an experimental key type, has a pre-authentication integer overflow if a client or server is configured to use a crafted XMSS key. This leads to memory corruption and local code execution because of an error in the XMSS key parsing algorithm. NOTE: the XMSS implementation is considered experimental in all released OpenSSH versions, and there is no supported way to enable it when building portable OpenSSH.

Impact

Vector 3.x

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

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Base Score 3.x

7.80

Severity 3.x

HIGH

Vector 2.0

AV:L/AC:M/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 4.40 MEDIUM
Vector: AV:L/AC:M/Au:N/C:P/I:P/A:P

Attack Vector (AV): Local
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0

4.40

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:openbsd:openssh::::::::	7.7 (including)	7.9 (including)
cpe:2.3:a:openbsd:openssh::::::::	8.0 (including)	8.1 (excluding)
cpe:2.3:a:netapp:cloud_backup:-:::::::*
cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:::::::*
cpe:2.3:o:siemens:scalance_x204rna_firmware::::::::		3.2.7 (excluding)
cpe:2.3:h:siemens:scalance_x204rna:-:::::::*
cpe:2.3:o:siemens:scalance_x204rna_ecc_firmware::::::::		3.2.7 (excluding)
cpe:2.3:h:siemens:scalance_x204rna_ecc:-:::::::*

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

CVE-2019-16905

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools