Critical severity · published Sep 27, 2019
CVE-2019-16928
Exim Out-of-bounds Write Vulnerability
In wildKEV
9.8
CVSS
41.6%
EPSS
Yes
On KEV
Description
Exim 4.92 through 4.92.2 allows remote code execution, a different vulnerability than CVE-2019-15846. There is a heap-based buffer overflow in string_vformat in string.c involving a long EHLO command.
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)41.6% · higher than 99% of CVEs
Exploited in the wildYes
CISA KEVListed Mar 3, 2022
Federal remediation dueMar 17, 2022
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
10.0 · source: NVD
EX
Exim · Exim
4.92 through 4.92.2 · source: NVD
FE
Fedora · Fedoraproject
29; 30; 31 · source: NVD
UL
Ubuntu Linux · Canonical
19.04 · source: NVD
EI
Exim Internet Mailer · Exim
All versions, or not specified · source: KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-16928
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-16928
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_MISC
https://lists.exim.org/lurker/message/20190927.032457.c1044d4c.en.html
x_refsource_MISC
https://bugs.exim.org/show_bug.cgi?id=2449
x_refsource_MISC
https://git.exim.org/exim.git/commit/478effbfd9c3cc5a627fc671d4bf94d13670d65f
mailing-list
http://www.openwall.com/lists/oss-security/2019/09/28/1
mailing-list
http://www.openwall.com/lists/oss-security/2019/09/28/2
mailing-list
http://www.openwall.com/lists/oss-security/2019/09/28/3
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