#VU48895 Improper Check for Certificate Revocation


Published: 2020-12-09 | Updated: 2021-04-27

Vulnerability identifier: #VU48895

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8286

CWE-ID: CWE-299

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
cURL
Client/Desktop applications / Other client software

Vendor: curl.haxx.se

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to incorrectly implemented checks for OCSP stapling. A remote attacker can provide a fraudulent OCSP response that would appear fine, instead of the real one.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

cURL: 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

CPE

External links
https://curl.haxx.se/docs/CVE-2020-8286.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


Latest bulletins with this vulnerability