Asterisk: Local privilege escalation through ast_loggrabber's world-writable helper location

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-57203
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-27 22:17:27 UTC
Updated2026-10-29 19:17:23 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, `ast_loggrabber` executes a `Python script` from the world-writable `/tmp` directory. An attacker already authorized to open a shell session on the Asterisk server may place a malicious script there and gain elevated privileges or execute code when an administrator runs `ast_loggrabber` as a user with elevated privileges. 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: v4.0 6.9 MEDIUM from [email protected]

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.001450000 probability, percentile 0.037650000 (date 2026-10-29)

Problem Types: CWE-426 | CWE-426 CWE-426: Untrusted Search Path

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary6.9MEDIUMCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/C...
4.0CNADECLARED6.9MEDIUMCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

CVSS v4.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
Low
User Interaction
Passive
Confidentiality
High
Integrity
High
Availability
None
Sub Conf.
High
Sub Integrity
High
Sub Availability
None

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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/commit/022407ec47adebe27b7ec8bcf5626e5a02fe... [email protected] github.com
github.com/asterisk/asterisk/commit/a51c4e3d6bccce4bc4226c43e78952573a62... [email protected] github.com
github.com/asterisk/asterisk/releases/tag/22.10.1 [email protected] github.com
github.com/asterisk/asterisk/security/advisories/GHSA-xgj6-2gc5-5x9c [email protected] github.com
github.com/asterisk/asterisk/releases/tag/20.20.1 [email protected] github.com
github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11 [email protected] github.com
github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3 [email protected] github.com
github.com/asterisk/asterisk/commit/bd63fe121d0e86867863bd98b5771e592273... [email protected] github.com
github.com/asterisk/asterisk/commit/c0fc2ae54cb6289a48a80333432f5fdf5a40... [email protected] github.com
github.com/asterisk/asterisk/releases/tag/23.4.1 [email protected] github.com
github.com/asterisk/asterisk/commit/ba8e5bdecd5280fc0ab230df59e41ea21b3a... [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/f18ac4c964781f671e400342790bf4067969... [email protected] github.com
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