Asterisk: ARI setChannelVar bypasses live_dangerously and permits FILE() writes

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-57202
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-27 18:17:37 UTC
Updated2026-10-28 17:18:34 UTC
DescriptionAsterisk 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, an authenticated Asterisk REST Interface (ARI) attacker with read-only privileges may use `setChannelVar` to execute write dialplan functions, including `FILE()` writes, even when `live_dangerously` in `asterisk.conf` is set to no. The Asterisk HTTP web server must be enabled and reachable, and the attacker must already have valid `read-only ARI credentials`. HTTP is disabled by default and binds only to 127.0.0.1 by default even when enabled. 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.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS: 0.004400000 probability, percentile 0.381880000 (date 2026-10-29)

Problem Types: CWE-267 | CWE-1220 | CWE-267 CWE-267: Privilege Defined With Unsafe Actions | CWE-1220 CWE-1220: Insufficient Granularity of Access Control

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
3.1CNADECLARED8.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Asterisk Asterisk affected < 20.20.1 Not specified
CNA Asterisk Asterisk affected >= 21.0.0-pre1, < 21.12.3 Not specified
CNA Asterisk Asterisk affected >= 22.0.0-pre1, < 22.10.1 Not specified
CNA Asterisk Asterisk affected >= 23.0.0-pre1, < 23.4.1 Not specified
CNA Asterisk Certified-asterisk affected < 20.7-cert11 Not specified
CNA Asterisk Certified-asterisk affected >= 22.8-cert1-pre1, < 22.8-cert3 Not specified

References

ReferenceSourceLinkTags
github.com/asterisk/asterisk/releases/tag/22.10.1 [email protected] github.com
github.com/asterisk/asterisk/commit/bf9354267557ef6d6b75f5304faa243f595a... [email protected] github.com
github.com/asterisk/asterisk/commit/d8614505b27688dec3a1d14554f52fda9471... [email protected] github.com
github.com/asterisk/asterisk/releases/tag/20.20.1 [email protected] github.com
github.com/asterisk/asterisk/commit/caa4d50d9c3bf04fc979b5b2cdc5dc425772... [email protected] github.com
github.com/asterisk/asterisk/commit/d47b0b6e5a384746db194f751b53d559aba8... [email protected] github.com
github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11 [email protected] github.com
github.com/asterisk/asterisk/security/advisories/GHSA-vrfp-mg3q-3959 [email protected] github.com
github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3 [email protected] github.com
github.com/asterisk/asterisk/releases/tag/23.4.1 [email protected] github.com
github.com/asterisk/asterisk/releases/tag/21.12.3 [email protected] github.com
github.com/asterisk/asterisk/tree/24.0.0-pre1 [email protected] github.com
github.com/asterisk/asterisk/commit/92a5dd1003b737ae1cd2df4e60b73beb8d5e... [email protected] github.com
github.com/asterisk/asterisk/commit/ba04e7f1f98887c3c6e0dc4ddce663021f7e... [email protected] github.com
github.com/asterisk/asterisk/commit/8f8ccaf70a80e518147b0c35c0c252de4735... [email protected] github.com
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