CVE-2020-28018

high-risk
Published 2021-05-06

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

Do I need to act?

!
78.7% chance of exploitation in next 30 days
EPSS score — higher than 21% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Exim

References (16)

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
Mailing List http://www.openwall.com/lists/oss-security/2021/05/12/3
Vendor Advisory https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28018-OCORK.tx...
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
Mailing List http://www.openwall.com/lists/oss-security/2021/05/12/3
Vendor Advisory https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28018-OCORK.tx...
57
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 20/34 · Moderate
Exposure 5/34 · Minimal