#VU93861 Observable discrepancy in Mojolicious - CVE-2020-36829

Vulnerability identifier: #VU93861

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-36829

CWE-ID: CWE-203

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mojolicious
Other software / Other software solutions

Vendor: SRI

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to observable discrepancy when comparing passwords. A remote attacker can guess the length of a secret string.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mojolicious: 5.28 - 8.64

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External links
https://github.com/mojolicious/mojo/pull/1601
https://github.com/mojolicious/mojo/issues/1599

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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.