Improper Check for Certificate Revocation in curl (Alpine package)

1) Improper Check for Certificate Revocation

EUVDB-ID: #VU48895

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-8286

CWE-ID: CWE-299 - Improper Check for Certificate Revocation

Exploit availability: No

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 update from vendor's website.

Vulnerable software versions

curl (Alpine package): 7.42.1-r0 - 7.73.0-r0

curl (Alpine package):

CPE2.3

• cpe:2.3:a:alpine:curl_alpine_package:7.42.1-r0:*:*:*:*:alpine_linux:*:3.1
• cpe:2.3:a:alpine:curl_alpine_package:7.47.0-r0:*:*:*:*:alpine_linux:*:3.1
• cpe:2.3:a:alpine:curl_alpine_package:7.47.1-r0:*:*:*:*:alpine_linux:*:3.3
• cpe:2.3:a:alpine:curl_alpine_package::*:*:*:*:alpine_linux:*:*

External links

https://git.alpinelinux.org/aports/commit/?id=a2da5d177a121c47684eb9ee6e49351cdaeae06b

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.