CVE-2015-7853

highPriorität · verfolgen · 43EPSS 0.118 · 96. PerzentilDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

—

no known exploitation

Likely / severe?

11.8% (96th) EPSS

CVSS 7.5 · high

Is it mine?

17 products

Prüfe deine Angriffsfläche

Who says so?

7 sources

cnnvd · enisa_euvd · fstec_bdu · auma_psirt

EPSS · bewertet 2026-10-23

The datalen parameter in the refclock driver in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a negative input 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.
MitigationSIMATIC CP 443-1 OPC UAsiemens_psirt
Configure an additional firewall to prevent communication to port udp/123 of an affected device
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.)
MitigationSIMATIC CP 443-1 OPC UAcisa_csaf_ot
Configure an additional firewall to prevent communication to port udp/123 of an affected device
Kein Fix geplantSIMATIC CP 443-1 OPC UAsiemens_psirt
Currently no remediation is planned
Kein Fix geplantSIMATIC CP 443-1 OPC UAcisa_csaf_ot
Currently no remediation is planned

cvss

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

9.8

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USAusnutzbarkeit 10 · Auswirkung 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USAusnutzbarkeit 3.9 · Auswirkung 5.9

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Psecondary · FSTEC (BDU) RU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · CISA US

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · AUMA PSIRT

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-120USprimärCWE-119USCWE-120USCWE-120USCWE-120US

betroffene Produkte (17)

Betroffene Produkte und Versionsbereiche.

AUMA SIMA² Master Stationalle Versionenfixedauma_psirtDE
AUMA SIMA² Master Station< V2.6auma_psirtDE
SIMATIC CP 443-1 OPC UA (6GK7443-1UX00-0XE0)alle Versionencisa_csaf_otUS
Siemens SIMATIC CP 443-1 OPC UA≤ vers:all/*cisa_csaf_otUS
n/a n/a≤ n/aenisa_euvdEU
Network Time Foundation NTP4.2 → 4.2.8p4fstec_bduRU
Network Time Foundation NTP4.3 → 4.3.77fstec_bduRU
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:*:*:*:*:*:*:*:*
netapp oncommand unified manageralle VersionennvdUScpe:2.3:a:netapp:oncommand_unified_manager:*:*:*:*:*:*:*:*
ntp ntp4.2.0 → 4.2.8nvdUScpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*
ntp ntp= 4.2.8nvdUScpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*
ntp ntp4.3.0 → 4.3.77nvdUScpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*
Siemens SIMATIC CP 443-1 OPC UA≤ vers:all/*siemens_psirtDE
Siemens SIMATIC CP 443-1 OPC UA (6GK7443-1UX00-0XE0)≤ vers:all/*siemens_psirtDE

Advisories (3)

Hersteller- und Ökosystem-Meldungen dazu.

SSA-211752SSA-211752: Multiple NTP-Client Related Vulnerabilities in SIMATIC CP 443-1 OPC UA2021-06-08csaf · siemens_psirtDE
All versions of the SIMATIC CP 443-1 OPC UA contain multiple vulnerabilities in the underlying third party component NTP. Siemens recommends specific countermeasures for products where updates 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-21-159-11Siemens SIMATIC NET CP 443-1 OPC UA2021-06-08icsa · cisa_csaf_otUS
All versions of the SIMATIC CP 443-1 OPC UA contain multiple vulnerabilities in the underlying third party component NTP. Siemens recommends specific countermeasures for products where updates are not, or not yet available.

auch bekannt als (6)

Weitere Namen und Kennungen dieser Entität.

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvd enisa_euvd fstec_bdu auma_psirt cisa_csaf_ot nvd siemens_psirt NVD CVE.org MITRE

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

verwandt (5,659)

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Integer overflow or wraparound in Windows Fast FAT Driver allows an unauthorized attacker to execute code locally.

+5654 weitere

Referenzen (65)

Externe Belege — Patches, Meldungen, Analysen.

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