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CVE-2026-57201

HIGH(7.5)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Risk Signal Score19/100 — NIEDRIG
  • CVSS 7.5 — Hoch

Erwähnungen (letzte 60 Tage)

Artikel

EPSS-Score

0.7%

Exploit-Wahrscheinlichkeit (30 Tage)

CVSS Score

7.5

Technische Schwere

Beschreibung

Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, a stack buffer overflow in the H.323 `ooTrace()` trace-logging function can occur when unbounded `vsprintf` writes into a fixed `2048-byte buffer`. A remote attacker may send a carefully crafted packet that causes the Asterisk process to crash. The `chan_ooh323` addon channel driver must be explicitly compiled and installed, which is not the default, and its port must be publicly reachable. This issue is fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.

Erkennung & Indikatoren

Ausnutzung

In den geprüften Quellen nicht genannt

Behobene Versionen

  • Asterisk 20.20.1
  • Asterisk 21.12.3
  • Asterisk 22.10.1
  • Asterisk 23.4.1
  • Certified Asterisk 20.7-cert11
  • Certified Asterisk 22.8-cert3

Threat-Hunting-Queries

Detection for H.323 trace-logging buffer overflow. Requires monitoring of Asterisk process crashes and H.323 traffic anomalies.

Sentinel/Defender KQL

DeviceProcessEvents
| where FileName == "asterisk" and ProcessCommandLine contains "H.323" and InitiatingProcessFileName == "chan_ooh323"
| summarize count() by DeviceName, InitiatingProcessCommandLine, bin(Timestamp, 1h)
| where count_ > 5 // Adjust threshold based on baseline
| project DeviceName, InitiatingProcessCommandLine, count_

Splunk SPL

index=your_asterisk_logs sourcetype=asterisk_h323 "H.323" "trace-logging" "crash" | stats count by host, source | where count > 5

Sigma

title: Asterisk H.323 Buffer Overflow Attempt
logsource:
  product: linux
  service: process_creation
detection:
  selection:
    Image|endswith: '\asterisk'
    CommandLine|contains: 'H.323'
    ParentImage|endswith: '\chan_ooh323'
  condition: selection
fields:
  - CommandLine
  - Image
  - ParentImage
level: high

Elastic ES|QL

from logs-process.process_creation-*
| where process.executable : "*asterisk" and process.command_line : "*H.323*" and process.parent.executable : "*chan_ooh323"
| stats count() by host.name, process.command_line
| where count > 5

SecBoard-generated · behavioral · requires customization — Von SecBoard erzeugt und nicht in einer Zielumgebung validiert. Vor dem Einsatz an die eigene Protokollierung anpassen.

Indikatoren

Datei-Hashes (6)

  • 2d7b8c8dc13d9ead8b6f36cc38b6dd91cd4abd3a
  • 33f62e351642edd9c58ef97b0002132722546af9
  • 875ac7413de0b7068cd12d0da2f140cd06ba9357
  • ac0a64dec6d4231bf005a68da6af3e02bb311634
  • bf0c9a906892bc0f91fa753476e326919e4e30e5
  • c4d9b4defe83f74523880fd630c02c49683786a3

Übernommen wurden nur Indikatoren, die wörtlich in einer Hersteller- oder Research-Quelle standen.

Referenzen