NCSC-2026-0073

Vulnerability from csaf_ncscnl - Published: 2026-02-27 09:48 - Updated: 2026-02-27 09:48
Summary
Kwetsbaarheid verholpen in Juniper Junos OS Evolved

Notes

The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions: NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein. NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory. This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings.
Feiten
Juniper heeft een kwetsbaarheid verholpen in Junos OS Evolved (Specifiek voor PTX Series apparaten).
Interpretaties
De kwetsbaarheid bevindt zich in het On-Box Anomaly detection framework van Junos OS Evolved dat draait op PTX Series apparaten. De oorzaak is een onjuiste toewijzing van rechten die ongeauthenticeerde externe aanvallers in staat stelt om code met rootprivileges uit te voeren. Deze kwetsbaarheid kan op afstand via het netwerk worden misbruikt zonder authenticatie, wat aanvallers volledige controle over het apparaat geeft. Het On-Box Anomaly Detection-framework mag uitsluitend door interne processen via de interne routinginstantie worden benaderd en niet via een extern blootgestelde poort. Om het risico op misbruik te verkleinen heeft Juniper een oplossing beschikbaar gesteld. Toegang dient te worden beperkt tot alleen vertrouwde netwerken en hosts met behulp van toegangslijsten of firewallfilters, waarbij uitsluitend de expliciet vereiste verbindingen worden toegestaan en alle overige verbindingen worden geblokkeerd. Als alternatief kan deze service volledig worden uitgeschakeld met het commando: **request pfe anomalies disable**.
Oplossingen
Juniper heeft updates uitgebracht om de kwetsbaarheid te verhelpen. Zie bijgevoegde referenties voor meer informatie.
Kans
medium
Schade
high
CWE-732
Incorrect Permission Assignment for Critical Resource
To clipboard 

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        "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n    NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n    NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n    This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
      },
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        "category": "description",
        "text": "De kwetsbaarheid bevindt zich in het On-Box Anomaly detection framework van Junos OS Evolved dat draait op PTX Series apparaten. De oorzaak is een onjuiste toewijzing van rechten die ongeauthenticeerde externe aanvallers in staat stelt om code met rootprivileges uit te voeren. Deze kwetsbaarheid kan op afstand via het netwerk worden misbruikt zonder authenticatie, wat aanvallers volledige controle over het apparaat geeft. \n\nHet On-Box Anomaly Detection-framework mag uitsluitend door interne processen via de interne routinginstantie worden benaderd en niet via een extern blootgestelde poort. Om het risico op misbruik te verkleinen heeft Juniper een oplossing beschikbaar gesteld. Toegang dient te worden beperkt tot alleen vertrouwde netwerken en hosts met behulp van toegangslijsten of firewallfilters, waarbij uitsluitend de expliciet vereiste verbindingen worden toegestaan en alle overige verbindingen worden geblokkeerd.\n\nAls alternatief kan deze service volledig worden uitgeschakeld met het commando: **request pfe anomalies disable**.",
        "title": "Interpretaties"
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        "text": "Incorrect Permission Assignment for Critical Resource",
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        "summary": "Reference",
        "url": "https://supportportal.juniper.net/s/article/2026-02-Out-of-Cycle-Security-Bulletin-Junos-OS-Evolved-PTX-Series-A-vulnerability-allows-a-unauthenticated-network-based-attacker-to-execute-code-as-root-CVE-2026-21902"
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          "text": "Incorrect Permission Assignment for Critical Resource",
          "title": "CWE-732"
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          "text": "A critical vulnerability in Juniper Networks Junos OS Evolved on PTX Series allows unauthenticated remote attackers to execute code as root due to incorrect permission assignments in the On-Box Anomaly detection framework, risking full device compromise.",
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          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/AU:Y/R:U/RE:M/U:Red",
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      "title": "CVE-2026-21902"
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}


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