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CVE-2024-42365

Asterisk remote code execution

7.4 HIGHPublic exploitEPSS 4.67%
  1. Published8 Aug 2024

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L

Affected products

Asterisk≥ 19.0.0 < 20.9.1 · < 18.24.2 · 21.4.0
Asterisk Certified Asterisk13.13.0 · 16.8.0 · 16.8 · 18.9

Remediation

Fixed in
Asterisk≥ 20.9.1

References

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Frequently asked

Is CVE-2024-42365 being actively exploited?

CVE-2024-42365 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 4.67%.

How severe is CVE-2024-42365?

CVE-2024-42365 has a CVSS 3.1 base score of 7.4, rated high. EPSS estimates a 4.67% probability of exploitation.

Which products are affected by CVE-2024-42365?

Affected products include Asterisk, Asterisk Certified Asterisk.

How do I fix CVE-2024-42365?

Upgrade affected software to a fixed version, for example Asterisk 20.9.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-42365 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.