Arch Linux Security Advisory ASA-202104-6 ========================================= Severity: High Date : 2021-04-29 CVE-ID : CVE-2021-21372 CVE-2021-21373 CVE-2021-21374 Package : nimble Type : multiple issues Remote : Yes Link : https://security.archlinux.org/AVG-1842 Summary ======= The package nimble before version 1:0.13.1-1 is vulnerable to multiple issues including arbitrary command execution and man-in-the-middle. Resolution ========== Upgrade to 1:0.13.1-1. # pacman -Syu "nimble>=1:0.13.1-1" The problems have been fixed upstream in version 0.13.1. Workaround ========== None. Description =========== - CVE-2021-21372 (arbitrary command execution) In Nimble before version 0.13.0, doCmd can be leveraged to execute arbitrary commands. An attacker can craft a malicious entry in the packages.json package list to trigger code execution. - CVE-2021-21373 (man-in-the-middle) In Nimble before version 0.13.0, "nimble refresh" fetches a list of Nimble packages over HTTPS by default. In case of error it falls back to a non-TLS URL http://irclogs.nim-lang.org/packages.json. An attacker able to perform MitM can deliver a modified package list containing malicious software packages. If the packages are installed and used the attack escalates to untrusted code execution. - CVE-2021-21374 (man-in-the-middle) In Nimble before version 0.13.0, "nimble refresh" fetches a list of Nimble packages over HTTPS without full verification of the SSL/TLS certificate due to the default setting of httpClient. An attacker able to perform man-in-the-middle (MitM) can deliver a modified package list containing malicious software packages. If the packages are installed and used the attack escalates to untrusted code execution. Impact ====== An attacker can perform a man-in-the-middle to inject malicious package dependencies to a client. In addition, a malicious packager can execute arbitrary code on the affected client by providing a maliciously- crafted package metadata file. References ========== https://github.com/nim-lang/security/security/advisories/GHSA-rg9f-w24h-962p https://consensys.net/diligence/vulnerabilities/nim-insecure-ssl-tls-default... https://github.com/nim-lang/nimble/commit/7bd63d504a4157b8ed61a51af47fb086ee... https://github.com/nim-lang/security/security/advisories/GHSA-8w52-r35x-rgp8 https://github.com/nim-lang/nimble/commit/aec0ae5c23d2e2a2ec28e97dcb9dd6cb1e... https://github.com/nim-lang/security/security/advisories/GHSA-c2wm-v66h-xhxx https://github.com/nim-lang/nimble/commit/b60b6f8d5832c7393676ba7bcd0e07d293... https://security.archlinux.org/CVE-2021-21372 https://security.archlinux.org/CVE-2021-21373 https://security.archlinux.org/CVE-2021-21374