CVE-2020-35680

2020-12-2416:15:15

Alpine Linux Development Team

security.alpinelinux.org

opensmtpd

remote attackers

denial of service

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

7.2

Confidence

High

EPSS

0.008

Percentile

81.1%

JSON

smtpd/lka_filter.c in OpenSMTPD before 6.8.0p1, in certain configurations, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted pattern of client activity, because the filter state machine does not properly maintain the I/O channel between the SMTP engine and the filters layer.

OSVersionArchitecturePackageVersionFilename
Alpine3.11-mainnoarchopensmtpd< 6.6.4p1-r1UNKNOWN
Alpine3.12-mainnoarchopensmtpd< 6.6.4p1-r2UNKNOWN
Alpine3.13-mainnoarchopensmtpd< 6.7.1p1-r1UNKNOWN