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CVE PROGRAM SOURCE RECORD8.2 High

CVE-2026-57191

Asterisk: Stack buffer overflow in MWI NOTIFY Message-Account parsing

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Status
Published
Published
Updated
Assigning organization
GitHub_M

Description

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, an unbounded `sscanf` in `res_pjsip_pubsub` when parsing the `MWI NOTIFY` `Message-Account` field may allow an unauthenticated attacker to send a carefully crafted packet that causes a stack buffer overflow and corrupts the underlying transport, permanently disabling all SIP functionality. An Asterisk restart is required to restore full operation. 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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

asterisk asterisk

  • < 20.20.1affected
  • >= 21.0.0-pre1, < 21.12.3affected
  • >= 22.0.0-pre1, < 22.10.1affected
  • >= 23.0.0-pre1, < 23.4.1affected

asterisk certified-asterisk

  • < 20.7-cert11affected
  • >= 22.8-cert1-pre1, < 22.8-cert3affected

References