What’s Vulnerable › Vulnerabilities

CVE-2023-49294: Asterisk Path Traversal vulnerability

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 45.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-12-14 · updated 2026-06-17
• Weakness: CWE-22

Description

Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1, as well as certified-asterisk prior to 18.9-cert6, it is possible to read any arbitrary file even when the `live_dangerously` is not enabled. This allows arbitrary files to be read. Asterisk versions 18.20.1, 20.5.1, and 21.0.1, as well as certified-asterisk prior to 18.9-cert6, contain a fix for this issue.

Affected products

• Digium Asterisk: before 18.20.1; from 19.0.0 before 20.5.1; 21.0.0 — fixed in 18.20.1, 20.5.1
• Sangoma Certified Asterisk: 13.13.0, 13.13.0-cert1, 13.13.0-cert1-rc1, 13.13.0-cert1-rc2, 13.13.0-cert1-rc3, 13.13.0-cert1-rc4 (+22)

How to fix

Upgrade to a fixed version: Digium Asterisk 18.20.1, 20.5.1. Check the vendor advisory for mitigations.

References

• https://github.com/asterisk/asterisk/blob/master/main/manager.c#L3757
• https://github.com/asterisk/asterisk/commit/424be345639d75c6cb7d0bd2da5f0f407dbd0bd5
• https://github.com/asterisk/asterisk/security/advisories/GHSA-8857-hfmw-vg8f
• https://lists.debian.org/debian-lts-announce/2023/12/msg00019.html
• https://github.com/asterisk/asterisk/blob/master/main/manager.c#L3757
• https://github.com/asterisk/asterisk/commit/424be345639d75c6cb7d0bd2da5f0f407dbd0bd5
• https://github.com/asterisk/asterisk/security/advisories/GHSA-8857-hfmw-vg8f
• https://lists.debian.org/debian-lts-announce/2023/12/msg00019.html

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