ICSA-21-194-07: Siemens Industrial Products LLDP (Update D)
CISA advisory · released 2021-07-13
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 5, 2023-03-14 (final)
CISA's summary
Summary: There are multiple vulnerabilities in an underlying Link Layer Discovery Protocol (LLDP) third party library. Siemens has released updates for the affected products and recommends to update to the latest versions.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Siemens | SIMATIC CP 1243-1 (6GK7243-1BX30-0XE0) | <V3.3.46 |
| Siemens | SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0) | <V3.3.46 |
| Siemens | SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0) | <V2.2.28 |
| Siemens | SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0) | <V2.2.28 |
| Siemens | SIMATIC CP 1543-1 (6GK7543-1AX00-0XE0) | <V3.0 |
| Siemens | SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0) | <V2.2.28 |
| Siemens | SIMATIC CP 1545-1 (6GK7545-1GX00-0XE0) | <V1.1 |
| Siemens | SIMATIC HMI Unified Comfort Panels | <V17 |
| Siemens | SINUMERIK ONE MCP | <V2.0.1 |
| Siemens | SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (6AG2542-6VX00-4XE0) | <V2.2.28 |
| Siemens | SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0) | <V2.2.28 |
| Siemens | SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0) | <V2.2.28 |
| Siemens | SIPLUS NET CP 1543-1 (6AG1543-1AX00-2XE0) | <V3.0 |
| Siemens | SIPLUS S7-1200 CP 1243-1 (6AG1243-1BX30-2AX0) | <V3.3.46 |
| Siemens | SIPLUS S7-1200 CP 1243-1 RAIL (6AG2243-1BX30-1XE0) | <V3.3.46 |
| Siemens | SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0) | <V2.2 |
| Siemens | TIM 1531 IRC (6GK7543-1MX00-0XE0) | <V2.2 |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2015-8011 — CVE-2015-8011 · CWE-120
Buffer overflow in the lldp_decode function in daemon/protocols/lldp.c in lldpd before 0.8.0 allows remote attackers to cause a denial of service (daemon crash) and possibly execute arbitrary code via vectors involving large management addresses and TLV boundaries.
- CVE-2020-27827 — CVE-2020-27827 · CWE-400
Specially crafted LLDP packets can cause memory to be lost when allocating data to handle specific optional TLVs, potentially causing a denial of service.
Acknowledgments, as the advisory lists them
- Siemens ProductCERT: reporting these vulnerabilities to CISA.
The advisory's legal notice
Siemens Security Advisories are subject to the terms and conditions contained in Siemens' underlying license terms or other applicable agreements previously agreed to with Siemens (hereinafter "License Terms"). To the extent applicable to information, software or documentation made available in or through a Siemens Security Advisory, the Terms of Use of Siemens' Global Website (https://www.siemens.com/terms_of_use, hereinafter "Terms of Use"), in particular Sections 8-10 of the Terms of Use, shall apply additionally. In case of conflicts, the License Terms shall prevail over the Terms of Use.
Sources
DeSpy's copy of this version is dated 2026-09-28.
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