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Arch Linux: ASA-202101-21 High Severity Insufficient Validation in Coturn

The package coturn before version 4.5.2-1 is vulnerable to insufficient validation. . Arch Linux Security Advisory ASA-202101-21 ========================================= Severity: High Date : 2021-01-12 CVE-ID : CVE-2020-26262 Package : coturn Type : insufficient validation Remote : Yes Link : https://security.archlinux.org/AVG-1430 Summary ====== The package coturn before version 4.5.2-1 is vulnerable to insufficient validation. Resolution ========= Upgrade to 4.5.2-1. # pacman -Syu "coturn> =4.5.2-1" The problem has been fixed upstream in version 4.5.2. Workaround ========= None. Description ========== A security issue was found in coturn before version 4.5.2. By default coturn does not allow peers to connect and relay packets to loopback addresses in the range of 127.x.x.x. However, it was observed that when sending a CONNECT request with the XOR-PEER-ADDRESS value of 0.0.0.0, a successful response was received and subsequently, CONNECTIONBIND also received a successful response. Coturn then is able to relay packets to the loopback interface. Additionally, when coturn is listening on IPv6, which is default, the loopback interface can also be reached by making use of either [::1] or [::] as the peer address. Impact ===== A malicious attacker might relay packets to the loopback interface due to insufficient validation of theconnection. References ========= https://github.com/coturn/coturn/security/advisories/GHSA-6g6j-r9rf-cm7p https://github.com/coturn/coturn/commit/ff5e5478a3e1b426bad053828099403cfc5c1f5f https://github.com/coturn/coturn/commit/af50d63a152cd9505d38f02bc552848748805e7b https://github.com/coturn/coturn/commit/6c774b9fb8d9d76576ece10a6429172ed3800466 https://github.com/coturn/coturn/commit/560684c894498285f9e4271f3c924ebf01f36307 https://github.com/coturn/coturn/commit/649cbf966181846ecdd7847e4543dd287a78d295 https://github.com/coturn/coturn/commit/9c7deff4b8ed8c323c87b9ede75481bd6bc3154d https://github.com/coturn/coturn/commit/dd0ffdb51a4cddaf1d6662079fa91f6f32bd26a8 https://github.com/coturn/coturn/commit/d84028b6dbc9eb7d3f8828ec37ae02a0963257b6 https://security.archlinux.org/CVE-2020-26262 . Enhance your coturn installation security on Arch Linux by updating your system, configuring settings, and monitoring logs for vulnerabilities and fixes. Arch Linux Security,coturn exploit,high severity,insufficient validation. . LinuxSecurity.com Team

Jan 15, 2021 ArchLinux