CVE-2020-28020

high-risk
Published 2021-05-06

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.

Do I need to act?

!
21.1% chance of exploitation in next 30 days
EPSS score — higher than 79% of all CVEs
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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 (6)

Mailing List http://www.openwall.com/lists/oss-security/2021/07/25/1
Mailing List http://www.openwall.com/lists/oss-security/2021/08/03/1
Patch https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28020-HSIZE.tx...
Mailing List http://www.openwall.com/lists/oss-security/2021/07/25/1
Mailing List http://www.openwall.com/lists/oss-security/2021/08/03/1
Patch https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28020-HSIZE.tx...
51
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 14/34 · Moderate
Exposure 5/34 · Minimal