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CVE-2026-57188high7.1

Asterisk: Stack buffer overflow in res_xmpp XMPP namespace prefix handling

Impact

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 authenticated attacker may cause a stack buffer overflow in res_xmpp XMPP namespace prefix handling using carefully crafted packets. The res_xmpp module must be loaded, an XMPP connection must be configured in xmpp.conf, and the attacker must have an XMPP account on the same or a federated server. 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.

Source excerpt · GitHub_M
Applies when

The res_xmpp module must be loaded, an XMPP connection must be configured in xmpp.conf, and the attacker must have an XMPP account on the same or a federated server.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

asterisk · asterisk

Version / rangeSource status
< 20.20.1affected
>= 21.0.0-pre1, < 21.12.3affected
>= 22.0.0-pre1, < 22.10.1affected
>= 23.0.0-pre1, < 23.4.1affected
GitHub_M version evidence

asterisk · certified-asterisk

Version / rangeSource status
< 20.7-cert11affected
>= 22.8-cert1-pre1, < 22.8-cert3affected
GitHub_M version evidence

Original source 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 authenticated attacker may cause a stack buffer overflow in res_xmpp XMPP namespace prefix handling using carefully crafted packets. The res_xmpp module must be loaded, an XMPP connection must be configured in xmpp.conf, and the attacker must have an XMPP account on the same or a federated server. 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.

References