CVE-2020-15688 - Authentication Bypass by Capture-replay

Severity

88%

Complexity

27%

Confidentiality

98%

GoAhead before 5.1.2 mishandles the nonce value during Digest authentication. This may permit request replay attacks for local requests over HTTP.

The HTTP Digest Authentication in the GoAhead web server before 5.1.2 does not completely protect against replay attacks. This allows an unauthenticated remote attacker to bypass authentication via capture-replay if TLS is not used to protect the underlying communication channel.

CVSS 3.1 Base Score 8.8. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 6.8. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:P).

Overview

First reported 4 years ago

2020-07-23 13:15:00

Last updated 4 years ago

2020-10-07 18:15:00

Affected Software

EmbedThis GoAhead

References

https://github.com/embedthis/goahead-gpl/issues/3

https://github.com/embedthis/goahead-gpl/issues/3

Third Party Advisory

http://packetstormsecurity.com/files/159505/EmbedThis-GoAhead-Web-Server-5.1.1-Digest-Authentication-Capture-Replay-Nonce-Reuse.html

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