CVE-2020-15953

HIGH

LibEtPan < 1.9.4 - Response Injection via STARTTLS Buffering Issue

Title source: llm

Description

LibEtPan through 1.9.4, as used in MailCore 2 through 0.6.3 and other products, has a STARTTLS buffering issue that affects IMAP, SMTP, and POP3. When a server sends a "begin TLS" response, the client reads additional data (e.g., from a meddler-in-the-middle attacker) and evaluates it in a TLS context, aka "response injection."

References (7)

Core 7

Core References

Exploit, Patch, Third Party Advisory x_refsource_misc

https://github.com/dinhvh/libetpan/issues/386

Third Party Advisory vendor-advisory x_refsource_gentoo

https://security.gentoo.org/glsa/202007-55

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

https://lists.debian.org/debian-lts-announce/2020/08/msg00026.html

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QFBWNA5REI5ZGW2DAOEAVHM23MOU6O5J/

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M65FVH5XPS23NLHFN3ABEGBSCHZAISXN/

Broken Link vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00060.html

Broken Link vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00075.html

Scores

CVSS v3 7.4

EPSS 0.0239

EPSS Percentile 81.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Details

CWE

CWE-74

Status published

Products (5)

debian/debian_linux 9.0

fedoraproject/fedora 31

fedoraproject/fedora 32

libetpan_project/libetpan < 1.9.4

libmailcore/mailcore2 < 0.6.3

Published Jul 27, 2020

Tracked Since Feb 18, 2026