| Name | CVE-2021-21373 |
| Description | Nimble is a package manager for the Nim programming language. In Nim release versions before versions 1.2.10 and 1.4.4, "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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more) |
| NVD severity | medium |
| Debian Bugs | 987272 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| nim (PTS) | stretch | 0.16.0-1 | vulnerable |
| buster | 0.19.4-1 | vulnerable |
| bullseye, sid | 1.4.6+really1.4.2-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| nim | source | (unstable) | 1.4.6+really1.4.2-1 | | | 987272 |
Notes
[buster] - nim <no-dsa> (Minor issue)
[stretch] - nim <postponed> (Minor issue; can be fixed in next update)
https://consensys.net/diligence/vulnerabilities/nim-insecure-ssl-tls-defaults-remote-code-execution/
Initially fixed in 1.4.6-1, but then reverted to 1.4.2 due to bullseye freeze