evolution-data-server (eds) through 3.36.3 has a STARTTLS buffering issue that affects SMTP and POP3. When a server sends a "begin TLS" response, eds reads additional data and evaluates it in a TLS context, aka "response injection."
https://bugzilla.suse.com/show_bug.cgi?id=1173910
https://gitlab.gnome.org/GNOME/evolution-data-server/-/issues/226
https://lists.debian.org/debian-lts-announce/2020/07/msg00012.html
https://security-tracker.debian.org/tracker/DLA-2281-1
https://security-tracker.debian.org/tracker/DSA-4725-1
Source: MITRE
Published: 2020-07-17
Updated: 2020-08-14
Type: CWE-74
Base Score: 4.3
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N
Impact Score: 2.9
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 5.9
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Impact Score: 3.6
Exploitability Score: 2.2
Severity: MEDIUM