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 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.
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/nimble/blob/master/changelog.markdown#0130Release NotesThird Party Advisory
- https://github.com/nim-lang/security/security/advisories/GHSA-8w52-r35x-rgp8Third Party Advisory
- https://consensys.net/diligence/vulnerabilities/nim-insecure-ssl-tls-defaults-reExploitThird 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-8w52-r35x-rgp8Third Party Advisory
FAQ
What is CVE-2021-21373?
CVE-2021-21373 is a vulnerability with a CVSS score of 7.5 (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 by default. In cas...
How severe is CVE-2021-21373?
CVE-2021-21373 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-21373?
Check the references section above for vendor advisories and patch information. Affected products include: Nim-Lang Nim.