Vulnerability identifier: #VU28246

Vulnerability risk: Medium

CVSSv3.1: 6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:U/RC:C]

CVE-ID: N/A

CWE-ID: CWE-310

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Passlib
Universal components / Libraries / Libraries used by multiple products

Vendor: Eli Collins

Description

The vulnerability allows a remote attacker to comrpomise the target system.

The vulnerability exists due to the affected product contains weak cryptography within the "bcrypt_sha256" when the SHA-256 prehash is unsalted. A remote attacker can perform breach correlation attacks.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Passlib: 1.7.2

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External links
http://snyk.io/vuln/SNYK-PYTHON-PASSLIB-569603
http://bitbucket.org/ecollins/passlib/issues/114/bcrypt_sha256-is-vulnerable-to-breach
http://bitbucket.org/ecollins/passlib/commits/bd0da1bdf0fd17b886212649184f2ce3eb8c8329

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.