High severity · published May 6, 2021
CVE-2020-28008
Exim 4 before 4.94.2 allows Execution with Unnecessary Privileges
7.8
CVSS
0.4%
EPSS
No
On KEV
Description
Exim 4 before 4.94.2 allows Execution with Unnecessary Privileges. Because Exim operates as root in the spool directory (owned by a non-root user), an attacker can write to a /var/spool/exim4/input spool header file, in which a crafted recipient address can indirectly lead to command execution.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EX
Exim · Exim
4.00 before 4.94.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-28008
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-28008
Vendor Advisory
https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28008-SPDIR.txt
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