Improper input validation in Nim-Lang Nim
CVE-2020-15694
In Nim 1.2.4, the standard library httpClient fails to properly validate the server response. For example, httpClient.get().contentLength() does not raise any error if a malicious server provides a negative Content-Length.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.023 (82.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/… (Patch, Third Party Advisory)
- nim-lang.org/blog/2020/07/30/versions-126-and-108-released.html (Third Party Advisory, Release Notes)
- www.openwall.com/lists/oss-security/2021/02/04/2 (mailing-list, Exploit, Mailing List, Third Party Advisory)
- consensys.net/diligence/vulnerabilities/nim-httpclient-header-crlf-injection/ (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-15694?
- CVE-2020-15694 is a high-severity vulnerability in Nim-Lang Nim, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2020-08-14.
- How severe is CVE-2020-15694?
- High severity. CVSS v3 base score is 7.5 out of 10.