CVE-2024-42365 Information

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.

Reference

https://github.com/asterisk/asterisk/security/advisories/GHSA-c4cg-9275-6w44 https://github.com/asterisk/asterisk/commit/42a2f4ccfa2c7062a15063e765916b3332e34cc4 https://github.com/asterisk/asterisk/commit/7a0090325bfa9d778a39ae5f7d0a98109e4651c8 https://github.com/asterisk/asterisk/commit/b4063bf756272254b160b6d1bd6e9a3f8e16cc71 https://github.com/asterisk/asterisk/commit/bbe68db10ab8a80c29db383e4dfe14f6eafaf993 https://github.com/asterisk/asterisk/commit/faddd99f2b9408b524e5eb8a01589fe1fa282df2 https://github.com/asterisk/asterisk/blob/14367caaf7241df1eceea7c45c5b261989c2c6db/main/manager.c#L6426 https://github.com/asterisk/asterisk/blob/7d28165cb1b2d02d66e8693bd3fe23ee72fc55d8/main/manager.c#L6426 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.