CURL-CVE-2020-8286

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Source
https://curl.se/docs/CVE-2020-8286.html
Import Source
https://curl.se/docs/CURL-CVE-2020-8286.json
JSON Data
https://api.test.osv.dev/v1/vulns/CURL-CVE-2020-8286
Aliases
Published
2020-12-09T08:00:00Z
Modified
2026-05-21T06:00:25.659359317Z
Summary
Inferior OCSP verification
Details

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 Like if the original certificate actually has been revoked.

Database specific 
{
    "CWE": {
        "id": "CWE-299",
        "desc": "Improper Check for Certificate Revocation"
    },
    "severity": "Medium",
    "www": "https://curl.se/docs/CVE-2020-8286.html",
    "affects": "both",
    "award": {
        "currency": "USD",
        "amount": "900"
    },
    "URL": "https://curl.se/docs/CVE-2020-8286.json",
    "issue": "https://hackerone.com/reports/1048457",
    "package": "curl",
    "last_affected": "7.73.0"
}
References
Credits
    • Ospoco - FINDER
    • Daniel Stenberg - REMEDIATION_DEVELOPER

Affected packages

Git / github.com/curl/curl.git

Affected ranges

Type
SEMVER
Events
Introduced
7.41.0
Fixed
7.74.0
Type
GIT
Repo
https://github.com/curl/curl.git
Events
Introduced
d1cf5d570663dac157740cb5e49d24614f185da7
Fixed
d9d01672785b8ac04aab1abb6de95fe3072ae199

Affected versions

7.*
7.41.0
7.42.0
7.42.1
7.43.0
7.44.0
7.45.0
7.46.0
7.47.0
7.47.1
7.48.0
7.49.0
7.49.1
7.50.0
7.50.1
7.50.2
7.50.3
7.51.0
7.52.0
7.52.1
7.53.0
7.53.1
7.54.0
7.54.1
7.55.0
7.55.1
7.56.0
7.56.1
7.57.0
7.58.0
7.59.0
7.60.0
7.61.0
7.61.1
7.62.0
7.63.0
7.64.0
7.64.1
7.65.0
7.65.1
7.65.2
7.65.3
7.66.0
7.67.0
7.68.0
7.69.0
7.69.1
7.70.0
7.71.0
7.71.1
7.72.0
7.73.0
Other
curl-7_41_0
curl-7_42_0
curl-7_42_1
curl-7_43_0
curl-7_44_0
curl-7_45_0
curl-7_46_0
curl-7_47_0
curl-7_47_1
curl-7_48_0
curl-7_49_0
curl-7_49_1
curl-7_50_0
curl-7_50_1
curl-7_50_2
curl-7_50_3
curl-7_51_0
curl-7_52_0
curl-7_52_1
curl-7_53_0
curl-7_53_1
curl-7_54_0
curl-7_54_1
curl-7_55_0
curl-7_55_1
curl-7_56_0
curl-7_56_1
curl-7_57_0
curl-7_58_0
curl-7_59_0
curl-7_60_0
curl-7_61_0
curl-7_61_1
curl-7_62_0
curl-7_63_0
curl-7_64_0
curl-7_64_1
curl-7_65_0
curl-7_65_1
curl-7_65_2
curl-7_65_3
curl-7_66_0
curl-7_67_0
curl-7_68_0
curl-7_69_0
curl-7_69_1
curl-7_70_0
curl-7_71_0
curl-7_71_1
curl-7_72_0
curl-7_73_0
tiny-curl-7_72_0

Database specific

source 
"https://curl.se/docs/CURL-CVE-2020-8286.json"