Critical severity · published May 6, 2021
CVE-2020-28018
Exim 4 before 4.94.2 allows Use After Free in smtp_reset in certain situations that may be common for builds with OpenSSL
9.8
CVSS
56.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)56.5% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EX
Exim · Exim
4.90 before 4.94.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-28018
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-28018
Mailing List
http://www.openwall.com/lists/oss-security/2021/05/11/14
Mailing List
http://www.openwall.com/lists/oss-security/2021/05/11/15
Mailing List
http://www.openwall.com/lists/oss-security/2021/05/11/17
Mailing List
http://www.openwall.com/lists/oss-security/2021/05/11/5
Mailing List
http://www.openwall.com/lists/oss-security/2021/05/11/6
Mailing List
http://www.openwall.com/lists/oss-security/2021/05/12/2
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