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CURL-CVE-2020-8286
No affected components available
libcurl offers "OCSP stapling" via the CURLOPT_SSL_VERIFYSTATUS option. When
set, libcurl verifies the OCSP response that a server responds with as part of
the TLS handshake. It then aborts the TLS negotiation if something is wrong
with the response. The same feature can be enabled with --cert-status using
the curl tool.
As part of the OCSP response verification, a client should verify that the response is indeed set out for the correct certificate. This step was not performed by libcurl when built or told to use OpenSSL as TLS backend.
This flaw would allow an attacker, who perhaps could have breached a TLS server, to provide a fraudulent OCSP response that would appear fine, instead of the real one. Like if the original certificate actually has been revoked.
Measures severity based on intrinsic characteristics of the vulnerability, independent of environment.
No exploitation activity has been observed at this time. Continue routine monitoring.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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