CVE-2015-7855

mediumPriorität · beachten · 47EPSS 0.311 · 98. PerzentilExploit · funktionalDEEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · funktional

Likely / severe?

31.1% (98th) EPSS

CVSS 4 · medium

Is it mine?

30 products

Prüfe deine Angriffsfläche

Who says so?

6 sources

cnnvd · enisa_euvd · auma_psirt · cisa_csaf_ot

EPSS · bewertet 2026-10-23

The decodenetnum function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (assertion failure) via a 6 or mode 7 packet containing a long data value.

Behebungen

Hersteller-Fix, Mitigation oder Workaround, wie von den Quellen veröffentlicht.

Ein Hersteller-Fix ist verfügbar.

BehobenSIMA² Master Stationauma_psirt
Upgrade your SIMA2 to software version 2.6 or above. The NTP service of the SIMA2 Master Station with software version V2.6 and above includes a current, supported version of ntpd.
MitigationSIMA² Master Stationauma_psirt
1. If your SIMA2 does not need to provide time information to other systems or synchronize itself with an NTP server, disable the NTP client on those systems. Please note that the NTP client is disabled by default in SIMA2 2. In case you must use the NTP server on an SIMA2, choose from the following options to reduce NTP-based risks: - Allow NTP traffic to/from trusted NTP clients only - Monitor the network for malicious NTP traffic going to/coming from the SIMA2 - Filter malicious NTP traffic going to/coming from the SIMA2 Monitor NTP server operations on your SIMA2 (server availability, correctness of advertised time, NTP-related log entries, etc.) 3. In case you must use the NTP client on an SIMA2, choose from the following options to reduce NTP-based risks: - Use trusted NTP servers only - Allow NTP traffic to/from trusted NTP servers only - Monitor the network for malicious NTP traffic targeting the SIMA2 - Filter malicious NTP traffic targeting the SIMA2 - Monitor NTP client operations on your SIMA2 (correctness of system time, NTP-related log entries, etc.)
MitigationROX IIcisa_csaf_ot
Update to the latest version. (http://www.siemens.com/automation/support-request)
http://www.siemens.com/automation/support-request
MitigationRUGGEDCOM ROX Icisa_csaf_ot
Update to the latest version. (http://www.siemens.com/automation/support-request)
http://www.siemens.com/automation/support-request
WorkaroundSIPLUS NET TIM 4R-IE (6AG1800-4BA00-7AA0)siemens_psirt
Configure an additional firewall to prevent communication to the port udp/123 of an affected device.
WorkaroundSIPLUS NET TIM 4R-IE DNP3 (6AG1803-4BA00-7AA0)siemens_psirt
Configure an additional firewall to prevent communication to the port udp/123 of an affected device.
WorkaroundTIM 4R-IE (6NH7800-4BA00)siemens_psirt
Configure an additional firewall to prevent communication to the port udp/123 of an affected device.
WorkaroundTIM 4R-IE DNP3 (6NH7803-4BA00-0AA0)siemens_psirt
Configure an additional firewall to prevent communication to the port udp/123 of an affected device.
WorkaroundSIPLUS NET TIM 4R-IE (6AG1800-4BA00-7AA0)cisa_csaf_ot
Configure an additional firewall to prevent communication to the port udp/123 of an affected device.
WorkaroundSIPLUS NET TIM 4R-IE DNP3 (6AG1803-4BA00-7AA0)cisa_csaf_ot
Configure an additional firewall to prevent communication to the port udp/123 of an affected device.
WorkaroundTIM 4R-IE (6NH7800-4BA00)cisa_csaf_ot
Configure an additional firewall to prevent communication to the port udp/123 of an affected device.
WorkaroundTIM 4R-IE DNP3 (6NH7803-4BA00-0AA0)cisa_csaf_ot
Configure an additional firewall to prevent communication to the port udp/123 of an affected device.
Kein Fix geplantSIPLUS NET TIM 4R-IE (6AG1800-4BA00-7AA0)siemens_psirt
Currently no fix is planned
Kein Fix geplantSIPLUS NET TIM 4R-IE DNP3 (6AG1803-4BA00-7AA0)siemens_psirt
Currently no fix is planned
Kein Fix geplantTIM 4R-IE (6NH7800-4BA00)siemens_psirt
Currently no fix is planned
Kein Fix geplantTIM 4R-IE DNP3 (6NH7803-4BA00-0AA0)siemens_psirt
Currently no fix is planned
Kein Fix geplantSIPLUS NET TIM 4R-IE (6AG1800-4BA00-7AA0)cisa_csaf_ot
Currently no fix is planned
Kein Fix geplantSIPLUS NET TIM 4R-IE DNP3 (6AG1803-4BA00-7AA0)cisa_csaf_ot
Currently no fix is planned
Kein Fix geplantTIM 4R-IE (6NH7800-4BA00)cisa_csaf_ot
Currently no fix is planned
Kein Fix geplantTIM 4R-IE DNP3 (6NH7803-4BA00-0AA0)cisa_csaf_ot
Currently no fix is planned

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

6.5

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · low–medium · 2.2–6.5

v2.04mediumAV:N/AC:L/Au:S/C:N/I:N/A:Pprimary · NVD / NIST USAusnutzbarkeit 8 · Auswirkung 2.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USAusnutzbarkeit 2.8 · Auswirkung 3.6

v3.02.2lowCVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:Lsecondary · CISA US

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · CISA US

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · Siemens ProductCERT DE

v3.16.2mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Psecondary · CVSS-BT (t0sche)

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · AUMA PSIRT

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-20USprimärCWE-20USCWE-20USCWE-20US

Exploits (1)

Öffentlicher Proof-of-Concept- und Exploit-Code.

EDB-40840NTP 4.2.8p3 - Denial of Servicefunktional · exploit_db

betroffene Produkte (30)

Betroffene Produkte und Versionsbereiche.

AUMA SIMA² Master Stationalle Versionenfixedauma_psirtDE
AUMA SIMA² Master Station< V2.6auma_psirtDE
SIPLUS NET TIM 4R-IE (6AG1800-4BA00-7AA0)alle Versionencisa_csaf_otUS
SIPLUS NET TIM 4R-IE DNP3 (6AG1803-4BA00-7AA0)alle Versionencisa_csaf_otUS
TIM 4R-IE (6NH7800-4BA00)alle Versionencisa_csaf_otUS
TIM 4R-IE DNP3 (6NH7803-4BA00-0AA0)alle Versionencisa_csaf_otUS
Siemens ROX II< 2.9.0cisa_csaf_otUS
Siemens RUGGEDCOM ROX I≤ vers:all/*cisa_csaf_otUS
Siemens SIPLUS NET TIM 4R-IE (6AG1800-4BA00-7AA0)≤ vers:all/*cisa_csaf_otUS
Siemens SIPLUS NET TIM 4R-IE DNP3 (6AG1803-4BA00-7AA0)≤ vers:all/*cisa_csaf_otUS
Siemens TIM 4R-IE (6NH7800-4BA00)≤ vers:all/*cisa_csaf_otUS
Siemens TIM 4R-IE DNP3 (6NH7803-4BA00-0AA0)≤ vers:all/*cisa_csaf_otUS
n/a n/a≤ n/aenisa_euvdEU
debian debian linux= 7.0nvdUScpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
debian debian linux= 8.0nvdUScpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
debian debian linux= 9.0nvdUScpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
netapp clustered data ontapalle VersionennvdUScpe:2.3:o:netapp:clustered_data_ontap:*:*:*:*:*:*:*:*
netapp data ontapalle VersionennvdUScpe:2.3:o:netapp:data_ontap:*:*:*:*:*:*:*:*
netapp oncommand balancealle VersionennvdUScpe:2.3:a:netapp:oncommand_balance:*:*:*:*:*:*:*:*
netapp oncommand performance manageralle VersionennvdUScpe:2.3:a:netapp:oncommand_performance_manager:*:*:*:*:*:*:*:*

20 von 30 angezeigt

Advisories (4)

Hersteller- und Ökosystem-Meldungen dazu.

SSA-497656SSA-497656: Multiple NTP Vulnerabilities in TIM 4R-IE Devices2021-04-13csaf · siemens_psirtDE
TIM 4R-IE devices contain multiple vulnerabilities in the integrated NTP component as listed below. Siemens recommends specific countermeasures for products where fixes are not, or not yet available.
VDE-2022-032AUMA: Multiple Vulnerabilities in Automation Runtime NTP Service2022-08-09csaf · auma_psirtDE
The SIMA2 Master Station features an NTP service based on ntpd, a reference implementation of the Network Time Protocol (NTP). Affected SIMA2 Master Stations with software version < V2.6 include an outdated version of ntpd which is affected by a large number of vulnerabilities
ICSA-15-356-01Siemens RUGGEDCOM ROX-based Devices NTP Vulnerabilities2015-09-24icsa · cisa_csaf_otUS
This CSAF advisory was extracted from unstructured data and may contain inaccuracies. If you notice any errors, please reach out to the designated contact at CISA CSAF: central@cisa.dhs.gov
ICSA-21-103-11Siemens TIM 4R-IE Devices2021-04-13icsa · cisa_csaf_otUS
TIM 4R-IE devices contain multiple vulnerabilities in the integrated NTP component as listed below. Siemens recommends specific countermeasures for products where fixes are not, or not yet available.

auch bekannt als (3)

Weitere Namen und Kennungen dieser Entität.

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvd enisa_euvd auma_psirt cisa_csaf_ot nvd siemens_psirt NVD CVE.org MITRE

veröffentlicht 2017-08-07geändert 2026-06-17

verwandt (25,127)

Verwandte Einträge.

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+25122 weitere

Referenzen (33)

Externe Belege — Patches, Meldungen, Analysen.

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