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.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-98decbde87 advisory.

    Update to Asterisk 18.26.4, addressing numerous security vulnerabilities     accumulated since the long-stale 18.12.1 package. The following CVEs are fixed     in this update:

    - CVE-2022-26498 (fixed in 18.13.0): use-after-free in chan_ooh323
    - CVE-2022-42705 (fixed in 18.15.0): use-after-free in res_pjsip_pubsub
    - CVE-2022-37325 (fixed in 18.15.1): crash in H323 channel via malformed IE
    - CVE-2023-37457 (fixed in 18.20.0): buffer overflow in PJSIP_HEADER function
    - CVE-2023-49294 (fixed in 18.20.1): arbitrary file read via AMI GetConfig
    - CVE-2023-49786 (fixed in 18.20.1): DTLS race condition causing DoS
    - CVE-2024-35190 (fixed in 18.23.1): unauthorized SIP requests matched as endpoint
    - CVE-2024-42365 (fixed in 18.24.2): Write=originate allows code execution
    - CVE-2024-42491 (fixed in 18.25.0): crash via malformed Contact/Record-Route URI
    - CVE-2025-49832 (fixed in 18.26.3): DoS/RCE in res_stir_shaken
    - CVE-2025-47779 (fixed in 18.26.2): identity forging via malformed From header
    - CVE-2025-1131  (fixed in 18.26.3): local privilege escalation via safe_asterisk
    - CVE-2025-54995 (fixed in 18.26.4): resource exhaustion via RTP port leak

    Also fixes F44FailsToInstall for asterisk-snmp (BZ#2433748).

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-80b21debe7 advisory.

    Update to Asterisk 18.26.4, addressing numerous security vulnerabilities     accumulated since the long-stale 18.12.1 package. The following CVEs are fixed     in this update:

    - CVE-2022-26498 (fixed in 18.13.0): use-after-free in chan_ooh323
    - CVE-2022-42705 (fixed in 18.15.0): use-after-free in res_pjsip_pubsub
    - CVE-2022-37325 (fixed in 18.15.1): crash in H323 channel via malformed IE
    - CVE-2023-37457 (fixed in 18.20.0): buffer overflow in PJSIP_HEADER function
    - CVE-2023-49294 (fixed in 18.20.1): arbitrary file read via AMI GetConfig
    - CVE-2023-49786 (fixed in 18.20.1): DTLS race condition causing DoS
    - CVE-2024-35190 (fixed in 18.23.1): unauthorized SIP requests matched as endpoint
    - CVE-2024-42365 (fixed in 18.24.2): Write=originate allows code execution
    - CVE-2024-42491 (fixed in 18.25.0): crash via malformed Contact/Record-Route URI
    - CVE-2025-49832 (fixed in 18.26.3): DoS/RCE in res_stir_shaken
    - CVE-2025-47779 (fixed in 18.26.2): identity forging via malformed From header
    - CVE-2025-1131  (fixed in 18.26.3): local privilege escalation via safe_asterisk
    - CVE-2025-54995 (fixed in 18.26.4): resource exhaustion via RTP port leak

    Also fixes F44FailsToInstall for asterisk-snmp (BZ#2433748).

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-38d71393c1 advisory.

    Update to Asterisk 18.26.4, addressing numerous security vulnerabilities     accumulated since the long-stale 18.12.1 package. The following CVEs are fixed     in this update:

    - CVE-2022-26498 (fixed in 18.13.0): use-after-free in chan_ooh323
    - CVE-2022-42705 (fixed in 18.15.0): use-after-free in res_pjsip_pubsub
    - CVE-2022-37325 (fixed in 18.15.1): crash in H323 channel via malformed IE
    - CVE-2023-37457 (fixed in 18.20.0): buffer overflow in PJSIP_HEADER function
    - CVE-2023-49294 (fixed in 18.20.1): arbitrary file read via AMI GetConfig
    - CVE-2023-49786 (fixed in 18.20.1): DTLS race condition causing DoS
    - CVE-2024-35190 (fixed in 18.23.1): unauthorized SIP requests matched as endpoint
    - CVE-2024-42365 (fixed in 18.24.2): Write=originate allows code execution
    - CVE-2024-42491 (fixed in 18.25.0): crash via malformed Contact/Record-Route URI
    - CVE-2025-49832 (fixed in 18.26.3): DoS/RCE in res_stir_shaken
    - CVE-2025-47779 (fixed in 18.26.2): identity forging via malformed From header
    - CVE-2025-1131  (fixed in 18.26.3): local privilege escalation via safe_asterisk
    - CVE-2025-54995 (fixed in 18.26.4): resource exhaustion via RTP port leak

    Also fixes F44FailsToInstall for asterisk-snmp (BZ#2433748).

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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-2024-35190)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - 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-2024-35190)

  - Asterisk is an open source private branch exchange (PBX) and telephony toolkit. Prior to asterisk versions
    18.24.2, 20.9.2, and 21.4.2 and certified-asterisk versions 18.9-cert11 and 20.7-cert2, an AMI user with
    `write=originate` may change all configuration files in the `/etc/asterisk/` directory. This occurs
    because they are able to curl remote files and write them to disk, but are also able to append to existing
    files using the `FILE` function inside the `SET` application. This issue may result in privilege
    escalation, remote code execution and/or blind server-side request forgery with arbitrary protocol.
    Asterisk versions 18.24.2, 20.9.2, and 21.4.2 and certified-asterisk versions 18.9-cert11 and 20.7-cert2
    contain a fix for this issue. (CVE-2024-42365)

  - 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 receive a patch, users should upgrade to one of the following
    versions: 18.24.3, 20.9.3, 21.4.3, certified-18.9-cert12, certified-20.7-cert2. Two workarounds are
    available. Disable res_resolver_unbound by setting `noload = res_resolver_unbound.so` in modules.conf, or
    set `rewrite_contact = yes` on all PJSIP endpoints. NOTE: This may not be appropriate for all Asterisk
    configurations. (CVE-2024-42491)

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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-2024-35190)

ID	Name	Product	Family	Type	Severity
311158	Fedora 42 : asterisk (2026-98decbde87)	Nessus	Fedora Local Security Checks	Local	high
311157	Fedora 43 : asterisk (2026-80b21debe7)	Nessus	Fedora Local Security Checks	Local	high
311100	Fedora 44 : asterisk (2026-38d71393c1)	Nessus	Fedora Local Security Checks	Local	high
252395	Linux Distros Unpatched Vulnerability : CVE-2024-35190	Nessus	Misc.	Local	medium
425704	Alpine: multiple asterisk packages: security update to 18.24.3-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	high
425704	Alpine: multiple asterisk packages: security update to 18.24.3-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	high
423718	Alpine: multiple asterisk packages: security update to 20.9.3-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	high
423718	Alpine: multiple asterisk packages: security update to 20.9.3-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	high
423677	Alpine: multiple asterisk packages: security update to 20.8.1-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	medium
423677	Alpine: multiple asterisk packages: security update to 20.8.1-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	medium
408417	Alpine: asterisk: security update to 20.8.1-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	medium
408417	Alpine: asterisk: security update to 20.8.1-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	medium

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CVE-2024-35190

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