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Technical advisory

USN-8786-1: rsyslog vulnerability

Official source
EudorIA operational summary

What it means

Priority 40/100

La vulnerabilità USN-8786-1 riguarda rsyslog, che potrebbe crashare a causa di traffico di rete malevolo, causando un denial of service. L'attacco richiede un accesso remoto e non è sfruttato attivamente in rete. La patch è disponibile tramite aggiornamenti del sistema.

Why it matters

Per le PMI italiane, un denial of service su rsyslog può interrompere la gestione log, compromettendo la tracciabilità e la sicurezza operativa. L'aggiornamento è essenziale per evitare interruzioni critiche.

MITRE ATT&CKT1562 · Impair Defenses *
Brief generato da un modello locale EudorIA (qwen3:8b@workstation-gpu) a partire dal testo della fonte. Verificare sulla fonte prima di decisioni operative; le tecniche con * sono inferite dal modello. Testo parziale, fonte editoriale, dettagli non pubblicati in modo completo sulle tecniche di attacco specifiche o sfruttamento attivo in rete.

Estratto della fonte usato dal modello

Your submission was sent successfully! Close Thank you for contacting us. A member of our team will be in touch shortly. Close You have successfully unsubscribed! Close Thank you for signing up for our newsletter! In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team. Close Your preferences have been successfully updated. Close notification Please try again or file a bug report. Close USN-8786-1: rsyslog vulnerability rsyslog could be made to crash if it received specially crafted network traffic. rsyslog - Enhanced syslogd It was discovered that rsyslog incorrectly calculated buffer sizes when replacing strings. A remote attacker could possibly use this issue to cause rsyslog to crash, resulting in a denial of service. It was discovered that rsyslog incorrectly calculated buffer sizes when replacing strings. A remote attacker could possibly use this issue to cause rsyslog to crash, resulting in a denial of service. After a standard system update you need to restart rsyslog to make all the necessary changes. The problem can be corrected by updating your system to the following package versions: rsyslog – 8.2512.0-1ubuntu4.2 rsyslog – 8.2312.0-3ubuntu9.4 rsyslog – 8.2112.0-2ubuntu2.5 rsyslog – 8.2001.0-1ubuntu1.3+esm1 Ubuntu Pro Fix available with Ubuntu Pro . rsyslog – 8.32.0-1ubuntu4.2+esm1 Ubuntu Pro Fix available with Ubuntu Pro . rsyslog – 8.16.0-1ubuntu3.1+esm3 Ubuntu Pro Fix available with Ubuntu Pro via Le

Potential operational benefits

  • Riduzione della superficie esposta a vulnerabilità di rsyslog
  • Miglioramento della resilienza contro denial of service
  • Sicurezza aggiuntiva grazie al supporto di Ubuntu Pro
Indications to confirm against the customer's technical and organisational perimeter.
Relevant controlsPatch managementMonitoraggio / SIEMFirewall NGFW / IPS
AudienceITSOC
Information centre

Translation in progress

Ubuntu Security

The official content is available in the original language. The Italian version will be published once automated checks are complete.

Text acquired from the source

It was discovered that rsyslog incorrectly calculated buffer sizes when replacing strings. A remote attacker could possibly use this issue to cause rsyslog to crash, resulting in a denial of service.

Source
Ubuntu Security Notices
Publishing entity
Ubuntu Security
Entity type
vendor security
Area
Global
Original language
en · translation in preparation
Publication
21/09/2026 14:22
MITRE ATT&CK
T1562
Open the original source