CVE-2021-21373
An attacker able to perform MitM can deliver a modified package list containing malicious software packages.
Does this matter?
Lower severity and a low EPSS score (1.16%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 1.16% probability · 65th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-348, CWE-295
- Affected
- nim-lang/nim
- Source
- security-advisories@github.com
References
- https://consensys.net/diligence/vulnerabilities/nim-insecure-ssl-tls-defaults-remote-code-execution/Exploit, Third Party Advisory
- https://github.com/nim-lang/nimble/blob/master/changelog.markdown#0130Release Notes, Third 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-remote-code-execution/Exploit, Third Party Advisory
- https://github.com/nim-lang/nimble/blob/master/changelog.markdown#0130Release Notes, Third Party Advisory
- https://github.com/nim-lang/security/security/advisories/GHSA-8w52-r35x-rgp8Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.