Vulnerability in Nim-Lang Nim
CVE-2021-21374
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L.
EPSS exploit prediction
EPSS: 0.010 (63.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: -0.000
Affected products
- Nim-Lang Nim
- Nim-Lang Security — versions < 1.2.10, >= 1.4.0, < 1.4.4
Weakness classification (CWE)
References
- consensys.net/diligence/vulnerabilities/nim-insecure-ssl-tls-defaults-remote-co… (Exploit, Third Party Advisory)
- github.com/nim-lang/nimble/blob/master/changelog.markdown (Third Party Advisory, Release Notes)
- github.com/nim-lang/security/security/advisories/GHSA-c2wm-v66h-xhxx (Third Party Advisory)
- github.com/nim-lang/Nim/pull/16940 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-21374?
- CVE-2021-21374 is a high-severity vulnerability in Nim-Lang Nim, classified under CWE-348. CVSS score: 8.1/10. Published 2021-03-26.
- How severe is CVE-2021-21374?
- High severity. CVSS v3 base score is 8.1 out of 10.