CVE-2020-15953

Severity Score

7.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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."

LibEtPan versiones hasta 1.9.4, como es usado en MailCore 2 versiones hasta 0.6.3 y otros productos, presenta un problema de almacenamiento en búfer STARTTLS que afecta a IMAP, SMTP y POP3. Cuando un servidor envía una respuesta "begin TLS", el cliente lee datos adicionales (por ejemplo, de un atacante de tipo meddler-in-the-middle) y los evalúa en un contexto TLS, también se conoce como "response injection"

*Credits: N/A

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-07-27 CVE Reserved
2020-07-27 CVE Published
2024-07-03 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

CAPEC

References (7)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2020/08/msg00026.html	Mailing List

URL	Date	SRC
https://github.com/dinhvh/libetpan/issues/386	2024-08-04

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00060.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00075.html	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M65FVH5XPS23NLHFN3ABEGBSCHZAISXN	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QFBWNA5REI5ZGW2DAOEAVHM23MOU6O5J	2023-11-07
https://security.gentoo.org/glsa/202007-55	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Libetpan Project Search vendor "Libetpan Project"		Libetpan Search vendor "Libetpan Project" for product "Libetpan"				<= 1.9.4 Search vendor "Libetpan Project" for product "Libetpan" and version " <= 1.9.4"		-		Affected
Libmailcore Search vendor "Libmailcore"		Mailcore2 Search vendor "Libmailcore" for product "Mailcore2"				<= 0.6.3 Search vendor "Libmailcore" for product "Mailcore2" and version " <= 0.6.3"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				31 Search vendor "Fedoraproject" for product "Fedora" and version "31"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				32 Search vendor "Fedoraproject" for product "Fedora" and version "32"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected