Vulnerability identifier: #VU34139

Vulnerability risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-14928

CWE-ID: CWE-74

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Debian Linux
Operating systems & Components / Operating system

Vendor: Debian

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

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."

Mitigation
Install update from vendor's website.

Vulnerable software versions

Debian Linux: 9.0 - 10.0

---

External links
http://bugzilla.suse.com/show_bug.cgi?id=1173910
http://gitlab.gnome.org/GNOME//evolution-data-server/commit/ba82be72cfd427b5d72ff21f929b3a6d8529c4df
http://gitlab.gnome.org/GNOME/evolution-data-server/-/commit/f404f33fb01b23903c2bbb16791c7907e457fbac
http://gitlab.gnome.org/GNOME/evolution-data-server/-/issues/226
http://lists.debian.org/debian-lts-announce/2020/07/msg00012.html
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QMBEZWA22EAYAZQWUX4KPEBER726KSIG/
http://security-tracker.debian.org/tracker/DLA-2281-1
http://security-tracker.debian.org/tracker/DSA-4725-1
http://usn.ubuntu.com/4429-1/
http://www.debian.org/security/2020/dsa-4725

---

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.