CVE-2020-35679

2020-12-2416:15:15

Debian Security Bug Tracker

security-tracker.debian.org

opensmtpd

vulnerability

memory leak

unix

regex lookups

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

EPSS

0.004

Percentile

72.0%

JSON

smtpd/table.c in OpenSMTPD before 6.8.0p1 lacks a certain regfree, which might allow attackers to trigger a “very significant” memory leak via messages to an instance that performs many regex lookups.

OSVersionArchitecturePackageVersionFilename
Debian12allopensmtpd< 6.8.0p2-1opensmtpd_6.8.0p2-1_all.deb
Debian11allopensmtpd< 6.8.0p2-1opensmtpd_6.8.0p2-1_all.deb
Debian999allopensmtpd< 6.8.0p2-1opensmtpd_6.8.0p2-1_all.deb
Debian13allopensmtpd< 6.8.0p2-1opensmtpd_6.8.0p2-1_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	12	all	opensmtpd	< 6.8.0p2-1	opensmtpd_6.8.0p2-1_all.deb
Debian	11	all	opensmtpd	< 6.8.0p2-1	opensmtpd_6.8.0p2-1_all.deb
Debian	999	all	opensmtpd	< 6.8.0p2-1	opensmtpd_6.8.0p2-1_all.deb
Debian	13	all	opensmtpd	< 6.8.0p2-1	opensmtpd_6.8.0p2-1_all.deb