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Vulnerability of libcurl: Man-in-the-Middle via TLS 1.3 Session Ticket Proxy Host Mixup

Synthesis of the vulnerability 

An attacker can act as a Man-in-the-Middle via TLS 1.3 Session Ticket Proxy Host Mixup on libcurl, in order to read or write data in the session.
Impacted software: cURL, Debian, Fedora, openSUSE Leap, Slackware, SLES, Ubuntu.
Severity of this computer vulnerability: 2/4.
Creation date: 31/03/2021.
Références of this announce: CVE-2021-22890, DSA-4881-1, FEDORA-2021-cab5c9befb, openSUSE-SU-2021:0510-1, SSA:2021-090-01, SUSE-SU-2021:1006-1, USN-4898-1, VIGILANCE-VUL-34978.

Description of the vulnerability 

An attacker can act as a Man-in-the-Middle via TLS 1.3 Session Ticket Proxy Host...
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This threat alert impacts software or systems such as cURL, Debian, Fedora, openSUSE Leap, Slackware, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this computer vulnerability bulletin is medium.

The trust level is of type confirmed by the editor, with an origin of internet server.

An attacker with a expert ability can exploit this weakness note.

Solutions for this threat 

Workarounds for this vulnerability are not yet public.
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