Sangoma Asterisk vulnerabilities

CVE-2026-23740 [HIGH] CWE-427 CVE-2026-23740: Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cer Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, when ast_coredumper writes its gdb init and output files to a directory that is world-writable (for example /tmp), an attacker with write permission(which is all users on a linux system) to that directory can ca

CVE-2026-23741 [HIGH] CWE-427 CVE-2026-23741: Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cer Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, the asterisk/contrib/scripts/ast_coredumper runs as root, as noted by the NOTES tag on line 689 of the ast_coredumper file. The script will source the contents of /etc/asterisk/ast_debug_tools.conf, which reside

CVE-2026-23738 [MEDIUM] CWE-79 CVE-2026-23738: Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cer Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, user supplied/control values for Cookies and any GET variable query Parameter are directly interpolated into the HTML of the page using ast_str_append. The endpoint at GET /httpstatus is the potential vulnerabl

CVE-2026-23739 [MEDIUM] CWE-611 CVE-2026-23739: Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cer Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, the ast_xml_open() function in xml.c parses XML documents using libxml with unsafe parsing options that enable entity expansion and XInclude processing. Specifically, it invokes xmlReadFile() with the XML_PARS

CVE-2025-1131 [HIGH] CWE-427 CVE-2025-1131: A local privilege escalation vulnerability exists in the safe_asterisk script included with the Aste A local privilege escalation vulnerability exists in the safe_asterisk script included with the Asterisk toolkit package. When Asterisk is started via this script (common in SysV init or FreePBX environments), it sources all .sh files located in /etc/asterisk/startup.d/ as root, without validating ownership or permissions. Non-root users with legitima

CVE-2025-57767 [HIGH] CWE-253 CVE-2025-57767: Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.15.2, Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.15.2, 21.10.2, and 22.5.2, if a SIP request is received with an Authorization header that contains a realm that wasn't in a previous 401 response's WWW-Authenticate header, or an Authorization header with an incorrect realm was received without a previous 40

CVE-2025-54995 [MEDIUM] CWE-400 CVE-2025-54995: Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 18.26.4 Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 18.26.4 and 18.9-cert17, RTP UDP ports and internal resources can leak due to a lack of session termination. This could result in leaks and resource exhaustion. This issue has been patched in versions 18.26.4 and 18.9-cert17.

CVE-2025-49832 [MEDIUM] CWE-476 CVE-2025-49832: Asterisk is an open source private branch exchange and telephony toolkit. In versions up to and incl Asterisk is an open source private branch exchange and telephony toolkit. In versions up to and including 18.26.2, between 20.00.0 and 20.15.0, 20.7-cert6, 21.00.0, 22.00.0 through 22.5.0, there is a remote DoS and possible RCE condition in `asterisk/res/res_stir_shaken /verification.c` that can be exploited when an attacker can set an arbitrary Ide

CVE-2025-47779 [MEDIUM] CWE-140 CVE-2025-47779: Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.26.2, 20.14.1, 21.9.1 Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.26.2, 20.14.1, 21.9.1, and 22.4.1 of Asterisk and versions 18.9-cert14 and 20.7-cert5 of certified-asterisk, SIP requests of the type MESSAGE (RFC 3428) authentication do not get proper alignment. An authenticated attacker can spoof any user identity to send spam messages

CVE-2025-47780 [MEDIUM] CWE-78 CVE-2025-47780: Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.26.2, 20.14.1, 21.9.1 Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.26.2, 20.14.1, 21.9.1, and 22.4.1 of Asterisk and versions 18.9-cert14 and 20.7-cert5 of certified-asterisk, trying to disallow shell commands to be run via the Asterisk command line interface (CLI) by configuring `cli_permissions.conf` (e.g. with the config line `deny=!*`

CVE-2024-57520 [CRITICAL] CWE-732 CVE-2024-57520: Insecure Permissions vulnerability in asterisk v22 allows a remote attacker to execute arbitrary cod Insecure Permissions vulnerability in asterisk v22 allows a remote attacker to execute arbitrary code via the action_createconfig function. NOTE: this is disputed by the Supplier because the impact is limited to creating empty files outside of the Asterisk product directory (aka directory traversal) and the attack can only be performed by a privil

CVE-2024-53566 [MEDIUM] CWE-22 CVE-2024-53566: An issue in the action_listcategories() function of Sangoma Asterisk v22/22.0.0/22.0.0-rc1/22.0.0-rc An issue in the action_listcategories() function of Sangoma Asterisk v22/22.0.0/22.0.0-rc1/22.0.0-rc2/22.0.0-pre1 allows attackers to execute a path traversal.

CVE-2024-42491 [MEDIUM] CWE-252 CVE-2024-42491: Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.24.3, 20.9.3, and 21. Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.24.3, 20.9.3, and 21.4.3 of Asterisk and versions 18.9-cert12 and 20.7-cert2 of certified-asterisk, if Asterisk attempts to send a SIP request to a URI whose host portion starts with `.1` or `[.1]`, and res_resolver_unbound is loaded, Asterisk will crash with a SEGV. To r

CVE-2024-35190 [MEDIUM] CWE-303 CVE-2024-35190: Asterisk is an open source private branch exchange and telephony toolkit. After upgrade to 18.23.0, Asterisk is an open source private branch exchange and telephony toolkit. After upgrade to 18.23.0, ALL unauthorized SIP requests are identified as PJSIP Endpoint of local asterisk server. This vulnerability is fixed in 18.23.1, 20.8.1, and 21.3.1.

CVE-2022-37325 [HIGH] CWE-787 CVE-2022-37325: In Sangoma Asterisk through 16.28.0, 17.x and 18.x through 18.14.0, and 19.x through 19.6.0, an inco In Sangoma Asterisk through 16.28.0, 17.x and 18.x through 18.14.0, and 19.x through 19.6.0, an incoming Setup message to addons/ooh323c/src/ooq931.c with a malformed Calling or Called Party IE can cause a crash.

CVE-2022-42705 [MEDIUM] CWE-416 CVE-2022-42705: A use-after-free in res_pjsip_pubsub.c in Sangoma Asterisk 16.28, 18.14, 19.6, and certified/18.9-ce A use-after-free in res_pjsip_pubsub.c in Sangoma Asterisk 16.28, 18.14, 19.6, and certified/18.9-cert2 may allow a remote authenticated attacker to crash Asterisk (denial of service) by performing activity on a subscription via a reliable transport at the same time that Asterisk is also performing activity on that subscription.

CVE-2022-42706 [MEDIUM] CWE-22 CVE-2022-42706: An issue was discovered in Sangoma Asterisk through 16.28, 17 and 18 through 18.14, 19 through 19.6, An issue was discovered in Sangoma Asterisk through 16.28, 17 and 18 through 18.14, 19 through 19.6, and certified through 18.9-cert1. GetConfig, via Asterisk Manager Interface, allows a connected application to access files outside of the asterisk configuration directory, aka Directory Traversal.

CVE-2022-23608 [CRITICAL] CWE-416 CVE-2022-23608: PJSIP is a free and open source multimedia communication library written in C language implementing PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In versions up to and including 2.11.1 when in a dialog set (or forking) scenario, a hash key shared by multiple UAC dialogs can potentially be prematurely freed when one of the dia

CVE-2022-21723 [CRITICAL] CWE-125 CVE-2022-21723: PJSIP is a free and open source multimedia communication library written in C language implementing PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In versions 2.11.1 and prior, parsing an incoming SIP message that contains a malformed multipart can potentially cause out-of-bound read access. This issue affects all PJSIP users

CVE-2021-37706 [CRITICAL] CWE-191 CVE-2021-37706: PJSIP is a free and open source multimedia communication library written in C language implementing PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In affected versions if the incoming STUN message contains an ERROR-CODE attribute, the header length is not checked before performing a subtraction operation, potentially resulting