Vulnerability · Published Jan 30, 2021 · Assigned by mitre
CVE-2020-15690
Critical 9.8
In plain English
A critical-severity security flaw in the nim package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 3.2% (higher than 88% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)3.2%top 11.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
In Nim before 1.2.6, the standard library asyncftpclient lacks a check for whether a message contains a newline character.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | nim | 1.2.6-1 | DEBIAN-CVE-2020-15690 |
| Debian:14 | nim | 1.2.6-1 | DEBIAN-CVE-2020-15690 |
| Ubuntu:24.04:LTS | nim | no fix listed | UBUNTU-CVE-2020-15690 |
| Ubuntu:25.10 | nim | no fix listed | UBUNTU-CVE-2020-15690 |
| Ubuntu:26.04:LTS | nim | no fix listed | UBUNTU-CVE-2020-15690 |
| Ubuntu:26.10 | nim | no fix listed | UBUNTU-CVE-2020-15690 |
Affected products (as reported)
References
- https://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/asyncftpclient.nim#L145 x_refsource_MISC
- https://github.com/nim-lang/Nim/compare/v1.2.4...v1.2.6 x_refsource_CONFIRM
- https://consensys.net/diligence/vulnerabilities/nim-asyncftpd-crlf-injection/ x_refsource_MISC
- https://github.com/tintinweb/pub/tree/master/pocs/cve-2020-15690 x_refsource_MISC
- [oss-security] 20210204 [CVE-2020-15690] Nim - stdlib asyncftpd - Crlf Injection mailing-list, x_refsource_MLIST