CVE-2020-28020

2021-05-0400:00:00

ubuntu.com

cve-2020-28020

exim 4

integer overflow

buffer overflow

arbitrary code execution

continuation lines

header-length restriction

unix

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.031

Percentile

91.2%

JSON

Exim 4 before 4.92 allows Integer Overflow to Buffer Overflow, in which an
unauthenticated remote attacker can execute arbitrary code by leveraging
the mishandling of continuation lines during header-length restriction.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchexim4< 4.90.1-1ubuntu1.8UNKNOWN
ubuntu14.04noarchexim4< 4.82-3ubuntu2.4+esm3UNKNOWN
ubuntu16.04noarchexim4< 4.86.2-2ubuntu2.6+esm1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	exim4	< 4.90.1-1ubuntu1.8	UNKNOWN
ubuntu	14.04	noarch	exim4	< 4.82-3ubuntu2.4+esm3	UNKNOWN
ubuntu	16.04	noarch	exim4	< 4.86.2-2ubuntu2.6+esm1	UNKNOWN