Vulnerability 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 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nim-Lang | Nim | < 1.2.10 |
Related Weaknesses (CWE)
References
- https://consensys.net/diligence/vulnerabilities/nim-insecure-ssl-tls-defaults-reExploitThird Party Advisory
- https://github.com/nim-lang/Nim/pull/16940PatchThird Party Advisory
- https://github.com/nim-lang/nimble/blob/master/changelog.markdown#0130Release NotesThird Party Advisory
- https://github.com/nim-lang/security/security/advisories/GHSA-c2wm-v66h-xhxxThird Party Advisory
- https://consensys.net/diligence/vulnerabilities/nim-insecure-ssl-tls-defaults-reExploitThird Party Advisory
- https://github.com/nim-lang/Nim/pull/16940PatchThird Party Advisory
- https://github.com/nim-lang/nimble/blob/master/changelog.markdown#0130Release NotesThird Party Advisory
- https://github.com/nim-lang/security/security/advisories/GHSA-c2wm-v66h-xhxxThird Party Advisory
FAQ
What is CVE-2021-21374?
CVE-2021-21374 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 verif...
How severe is CVE-2021-21374?
CVE-2021-21374 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-21374?
Check the references section above for vendor advisories and patch information. Affected products include: Nim-Lang Nim.