CVE-2021-21374
HIGHNim <1.2.10 and 1.4.4 - Code Execution via Nimble Package List Man-in-the-Middle
Title source: manualDescription
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 without full verification of the SSL/TLS certificate due to the default setting of httpClient. 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.
References (4)
Core 4
Core References
Exploit, Third Party Advisory x_refsource_misc
https://consensys.net/diligence/vulnerabilities/nim-insecure-ssl-tls-defaults-remote-code-execution/
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/nim-lang/nimble/blob/master/changelog.markdown#0130
Third Party Advisory x_refsource_confirm
https://github.com/nim-lang/security/security/advisories/GHSA-c2wm-v66h-xhxx
Patch, Third Party Advisory x_refsource_misc
https://github.com/nim-lang/Nim/pull/16940
Scores
CVSS v3
8.1
EPSS
0.0103
EPSS Percentile
59.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L
Details
CWE
CWE-295
CWE-348
CWE-349
CWE-599
Status
published
Products (1)
nim-lang/nim
< 1.2.10
Published
Mar 26, 2021
Tracked Since
Feb 18, 2026