Critical severity · published Jan 25, 2022
CVE-2021-43298
The code that performs password matching when using 'Basic' HTTP authentication does not use a constant-time memcmp and has no rate-limiting
9.8
CVSS
2.3%
EPSS
No
On KEV
Description
The code that performs password matching when using 'Basic' HTTP authentication does not use a constant-time memcmp and has no rate-limiting. This means that an unauthenticated network attacker can brute-force the HTTP basic password, byte-by-byte, by recording the webserver's response time until the unauthorized (401) response.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.3% · higher than 83% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GO
Goahead · Embedthis
before 5.1.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-43298
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-43298
Third Party Advisory
https://github.com/embedthis/goahead/issues/304
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