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, the LDAP realtime driver `res_config_ldap` may permit `LDAP filter injection` through a `SIP username`, allowing an unauthenticated attacker to make arbitrary LDAP queries using carefully crafted SIP packets and disclose information. The `res_config_ldap` module must be loaded and configured to access an LDAP server, which is not the default. 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.
Published: 2026-10-26
Score: 6.9 Medium
EPSS: 2.0% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sat, 31 Oct 2026 03:30:00 +0100

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 27 Oct 2026 05:30:00 +0100

Type Values Removed Values Added
First Time appeared Asterisk
Asterisk asterisk
Asterisk certified Asterisk
Vendors & Products Asterisk
Asterisk asterisk
Asterisk certified Asterisk

Mon, 26 Oct 2026 21:00:00 +0100

Type Values Removed Values Added
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, the LDAP realtime driver `res_config_ldap` may permit `LDAP filter injection` through a `SIP username`, allowing an unauthenticated attacker to make arbitrary LDAP queries using carefully crafted SIP packets and disclose information. The `res_config_ldap` module must be loaded and configured to access an LDAP server, which is not the default. 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.
Title Asterisk: LDAP Filter Injection in res_config_ldap via SIP Username (Unauthenticated Information Disclosure)
Weaknesses CWE-943
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'}


Subscriptions

Asterisk Asterisk Certified Asterisk
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-31T01:46:55.030Z

Reserved: 2026-06-24T02:00:46.800Z

Link: CVE-2026-57193

cve-icon Vulnrichment

Updated: 2026-10-31T01:46:50.500Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-10-26T20:17:56.877

Modified: 2026-10-31T02:17:34.120

Link: CVE-2026-57193

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-27T17:00:08Z

Weaknesses