CVE-2020-28018

critical
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

Exim 4 before 4.94.2 allows Use After Free in smtp_reset in certain situations that may be common for builds with OpenSSL.

References

https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28018-OCORK.txt

http://www.openwall.com/lists/oss-security/2021/05/11/5

http://www.openwall.com/lists/oss-security/2021/05/11/6

http://www.openwall.com/lists/oss-security/2021/05/11/17

http://www.openwall.com/lists/oss-security/2021/05/11/15

http://www.openwall.com/lists/oss-security/2021/05/11/14

http://www.openwall.com/lists/oss-security/2021/05/12/2

http://www.openwall.com/lists/oss-security/2021/05/12/3

Details

Source: MITRE

Published: 2021-05-06

Updated: 2021-05-26

Type: CWE-416

Risk Information

CVSS v2

Base Score: 7.5

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

Impact Score: 6.4

Exploitability Score: 10

Severity: HIGH

CVSS v3

Base Score: 9.8

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

Impact Score: 5.9

Exploitability Score: 3.9

Severity: CRITICAL

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*

Tenable Plugins

View all (5 total)

IDNameProductFamilySeverity
149614openSUSE Security Update : exim (openSUSE-2021-677) (Stack Clash)NessusSuSE Local Security Checks
critical
149430Amazon Linux AMI : exim (ALAS-2021-1497)NessusAmazon Linux Local Security Checks
high
149277GLSA-202105-01 : Exim: Multiple vulnerabilitiesNessusGentoo Local Security Checks
critical
149260Exim < 4.94.2 Multiple Vulnerabilities (21Nails)NessusSMTP problems
critical
149253Ubuntu 18.04 LTS / 20.04 LTS / 20.10 / 21.04 : Exim vulnerabilities (USN-4934-1)NessusUbuntu Local Security Checks
critical