Nimble falls back to insecure http url when fetching packages
CVE-2021-21373

7.5HIGH

Key Information:

Vendor

Nim-lang

Status
Security
Vendor
CVE Published:
26 March 2021

What is CVE-2021-21373?

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.

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Affected Version(s)

security < 1.2.10 < 1.2.10

security >= 1.4.0, < 1.4.4 < 1.4.0, 1.4.4

References

https://consensys.net/diligence/vulnerabilities/nim-insec...
x_refsource_MISC
https://github.com/nim-lang/nimble/blob/master/changelog....
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https://github.com/nim-lang/security/security/advisories/...
x_refsource_CONFIRM

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
Low
Integrity:
High
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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