CVE-2023-42116
Published: 28 September 2023
Exim SMTP Challenge Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of NTLM challenge requests. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-17515.
Notes
Author | Note |
---|---|
eslerm | no security patches available, see ZDI's timeline |
allenpthuang | patches now available, see the thread on Openwall |
Priority
Status
Package | Release | Status |
---|---|---|
exim4 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.90.1-1ubuntu1.10+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
focal |
Released
(4.93-13ubuntu1.8)
|
|
jammy |
Released
(4.95-4ubuntu2.3)
|
|
lunar |
Released
(4.96-14ubuntu1.2)
|
|
mantic |
Released
(4.96-17ubuntu2)
|
|
trusty |
Released
(4.82-3ubuntu2.4+esm6)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
upstream |
Released
(4.96.1)
|
|
xenial |
Released
(4.86.2-2ubuntu2.6+esm4)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |