High severity · published Dec 22, 2019
CVE-2019-19920
sa-exim 4.2.1 allows attackers to execute arbitrary code if they can write a .cf file or a rule
8.8
CVSS
3.2%
EPSS
No
On KEV
Description
sa-exim 4.2.1 allows attackers to execute arbitrary code if they can write a .cf file or a rule. This occurs because Greylisting.pm relies on eval (rather than direct parsing and/or use of the taint feature). This issue is similar to CVE-2018-11805.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.2% · higher than 88% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
8.0; 9.0; 10.0 · source: NVD
SA
Sa-exim · Sa-exim Project
4.2.1 · source: NVD
UL
Ubuntu Linux · Canonical
16.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-19920
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-19920
Mailing List
https://bugs.debian.org/946829#24
Mailing List
https://lists.debian.org/debian-lts-announce/2020/01/msg00006.html
Mailing List
https://marc.info/?l=spamassassin-users&m=157668107325768&w=2
Mailing List
https://marc.info/?l=spamassassin-users&m=157668305026635&w=2
Third Party Advisory
https://usn.ubuntu.com/4520-1/
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