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CVE-2020-0601

Status Candidate

Overview

A spoofing vulnerability exists in the way Windows CryptoAPI (Crypt32.dll) validates Elliptic Curve Cryptography (ECC) certificates.An attacker could exploit the vulnerability by using a spoofed code-signing certificate to sign a malicious executable, making it appear the file was from a trusted, legitimate source, aka 'Windows CryptoAPI Spoofing Vulnerability'.

Related Files

CurveBall Microsoft Windows CryptoAPI Spoofing Proof Of Concept
Posted Jan 16, 2020
Authored by Ollypwn

Proof of concept exploit for the Microsoft Windows CurveBall vulnerability where the signature of certificates using elliptic curve cryptography (ECC) is not correctly verified. ECC relies on different parameters. These parameters are standardized for many curves. However, Microsoft did not check all these parameters. The parameter G (the generator) was not checked, and the attacker can therefore supply his own generator, such that when Microsoft tries to validate the certificate against a trusted CA, it will only look for matching public keys, and then use then use the generator of the certificate.

tags | exploit, proof of concept
systems | windows
advisories | CVE-2020-0601
SHA-256 | d9f0b10579f568648f3f6770ab1c8d5cbdf6c5bf56bd77131137a69282cb97e2
CurveBall Microsoft Windows CryptoAPI Spoofing Proof Of Concept
Posted Jan 16, 2020
Authored by Kudelski Security

This is a proof of concept exploit that demonstrates the Microsoft Windows CryptoAPI spoofing vulnerability as described in CVE-2020-0601 and disclosed by the NSA.

tags | exploit, spoof, proof of concept
systems | windows
advisories | CVE-2020-0601
SHA-256 | dbcf6e21e9b280b90adc6d4dc06dc38feadb3dd70aef54f167d5df5417901041
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