CVE-2021-25669
published 2021-04-22CVE-2021-25669: A vulnerability has been identified in SCALANCE X200-4P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT PRO (All…
PriorityP261critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
2.13%
79.6th percentile
A vulnerability has been identified in SCALANCE X200-4P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT PRO (All versions < 5.5.1), SCALANCE X202-2 IRT (All versions < 5.5.1), SCALANCE X202-2P IRT (incl. SIPLUS NET variant) (All versions < 5.5.1), SCALANCE X202-2P IRT PRO (All versions < 5.5.1), SCALANCE X204 IRT (All versions < 5.5.1), SCALANCE X204 IRT PRO (All versions < 5.5.1), SCALANCE X204-2 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X204-2FM (All versions < V5.2.5), SCALANCE X204-2LD (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X204-2LD TS (All versions < V5.2.5), SCALANCE X204-2TS (All versions < V5.2.5), SCALANCE X206-1 (All versions < V5.2.5), SCALANCE X206-1LD (All versions < V5.2.5), SCALANCE X208 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X208PRO (All versions < V5.2.5), SCALANCE X212-2 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X212-2LD (All versions < V5.2.5), SCALANCE X216 (All versions < V5.2.5), SCALANCE X224 (All versions < V5.2.5), SCALANCE XF201-3P IRT (All versions < 5.5.1), SCALANCE XF202-2P IRT (All versions < 5.5.1), SCALANCE XF204 (All versions < V5.2.5), SCALANCE XF204 IRT (All versions < 5.5.1), SCALANCE XF204-2 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE XF204-2BA IRT (All versions < 5.5.1), SCALANCE XF206-1 (All versions < V5.2.5), SCALANCE XF208 (All versions < V5.2.5). Incorrect processing of POST requests in the web server may write out of bounds in stack. An attacker might leverage this to denial-of-service of the device or remote code execution.
Affected
58 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| siemens | scalance_x200-4p_irt | — | — |
| siemens | scalance_x200-4p_irt_firmware | < 5.5.1 | 5.5.1 |
| siemens | scalance_x201-3p_irt | — | — |
| siemens | scalance_x201-3p_irt_firmware | < 5.5.1 | 5.5.1 |
| siemens | scalance_x201-3p_irt_pro | — | — |
| siemens | scalance_x201-3p_irt_pro_firmware | < 5.5.1 | 5.5.1 |
| siemens | scalance_x202-2_irt | — | — |
| siemens | scalance_x202-2_irt_firmware | < 5.5.1 | 5.5.1 |
| siemens | scalance_x202-2p_irt | — | — |
| siemens | scalance_x202-2p_irt_firmware | < 5.5.1 | 5.5.1 |
| siemens | scalance_x202-2p_irt_pro | — | — |
| siemens | scalance_x202-2p_irt_pro_firmware | < 5.5.1 | 5.5.1 |
| siemens | scalance_x204-2 | — | — |
| siemens | scalance_x204-2_firmware | < 5.2.5 | 5.2.5 |
| siemens | scalance_x204-2fm | — | — |
| siemens | scalance_x204-2fm_firmware | < 5.2.5 | 5.2.5 |
| siemens | scalance_x204-2ld | — | — |
| siemens | scalance_x204-2ld_firmware | < 5.2.5 | 5.2.5 |
| siemens | scalance_x204-2ld_ts | — | — |
| siemens | scalance_x204-2ld_ts_firmware | < 5.2.5 | 5.2.5 |
| siemens | scalance_x204-2ts | — | — |
| siemens | scalance_x204-2ts_firmware | < 5.2.5 | 5.2.5 |
| siemens | scalance_x204_irt | — | — |
| siemens | scalance_x204_irt_firmware | < 5.5.1 | 5.5.1 |
| siemens | scalance_x204_irt_pro | — | — |
Detection & IOCsextracted from sources · hover to see the quote
- →CVE-2021-25669 is triggered via malformed POST requests to the web server of affected SCALANCE X200 devices; monitor for anomalous or oversized POST requests to the device web interface on ports 80/TCP and 443/TCP. ↗
- →Focus monitoring on TCP ports 80 and 443 for traffic to SCALANCE X200 series web servers, as these are the attack surface ports identified for this vulnerability. ↗
- ·No known public exploits specifically target this vulnerability at time of advisory publication. ↗
- ·The vulnerability is exploitable remotely with low attack complexity and requires no authentication (CVSS v3 9.8), meaning any network-reachable attacker can attempt exploitation without credentials. ↗
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
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GHSA
GHSA-2956-2v8q-xc52: A vulnerability has been identified in SCALANCE X200-4P IRT (All versions < 5
ghsa_unreviewed·2022-05-24
CVE-2021-25669 [CRITICAL] CWE-121 GHSA-2956-2v8q-xc52: A vulnerability has been identified in SCALANCE X200-4P IRT (All versions < 5
A vulnerability has been identified in SCALANCE X200-4P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT PRO (All versions < 5.5.1), SCALANCE X202-2 IRT (All versions < 5.5.1), SCALANCE X202-2P IRT (incl. SIPLUS NET variant) (All versions < 5.5.1), SCALANCE X202-2P IRT PRO (All versions < 5.5.1), SCALANCE X204 IRT (All versions < 5.5.1), SCALANCE X204 IRT PRO (All versions < 5.5.1), SCALANCE X204-2 (incl. SIPLUS NET variant) (All versions), SCALANCE X204-2FM (All versions), SCALANCE X204-2LD (incl. SIPLUS NET variant) (All versions), SCALANCE X204-2LD TS (All versions), SCALANCE X204-2TS (All versions), SCALANCE X206-1 (All versions), SCALANCE X206-1LD (All versions), SCALANCE X208 (incl. SIPLUS NET variant) (All versions), SCALANCE X208PRO (All
CISA ICS
Siemens Web Server of SCALANCE X200 (Update A)
cisa_ics·2021-04-13
Siemens Web Server of SCALANCE X200 (Update A)
## Archived Content In an effort to keep CISA.gov current, the archive contains outdated information that may not reflect current policy or programs.
ICS Advisory
##
Siemens Web Server of SCALANCE X200 (Update A)
Last RevisedSeptember 14, 2021
Alert CodeICSA-21-103-07
## 1. EXECUTIVE SUMMARY
- CVSS v3 9.8
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: Web Server of SCALANCE X200
- Vulnerabilities: Heap-based Buffer Overflow, Stack-based Buffer Overflow
## 2. UPDATE INFORMATION
This updated advisory is a follow-up to the original advisory titled ICSA-21-103-07 Siemens Web Server of SCALANCE X200 that was published April 13, 2021, on the ICS webpage on us-cert.cisa.gov.
## 3. RISK EVALUATION
Succ
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2021-04-22
Published