PT-2020-2435 · Siemens · Scalance S623+3

Published 2020-02-11 · Updated 2021-05-05 · CVE-2019-13926

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions SCALANCE S602 versions 3.0 through 4.1 SCALANCE S612 versions 3.0 through 4.1 SCALANCE S623 versions 3.0 through 4.1 SCALANCE S627-2M versions 3.0 through 4.1

Description A Denial-of-Service condition can be caused by specially crafted packets sent to port 443/tcp of affected devices, resulting in the web server being unavailable. This issue is related to an uncontrolled resource consumption. A cold reboot is required to restore the device's functionality.

Recommendations For SCALANCE S602 versions 3.0 through 4.1, restrict access to port 443/tcp to minimize the risk of exploitation. For SCALANCE S612 versions 3.0 through 4.1, restrict access to port 443/tcp to minimize the risk of exploitation. For SCALANCE S623 versions 3.0 through 4.1, restrict access to port 443/tcp to minimize the risk of exploitation. For SCALANCE S627-2M versions 3.0 through 4.1, restrict access to port 443/tcp to minimize the risk of exploitation. As a temporary workaround, consider restricting the use of the web server until a patch is available.

Fix

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

BDU:2020-02441

CVE-2019-13926

Affected Products

Scalance S602

Scalance S612

Scalance S623

Scalance S627-2M

References · 5

• https://bdu.fstec.ru/vul/2020-02441 · Security Note
• https://cert-portal.siemens.com/productcert/pdf/ssa-591405.pdf · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-13926 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-13926 · Security Note
• https://us-cert.gov/ics/advisories/icsa-20-042-10 · Note