CVE-2017-16944
Published: 27 November 2017
The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to cause a denial of service (infinite loop and stack exhaustion) via vectors involving BDAT commands and an improper check for a '.' character signifying the end of the content, related to the bdat_getc function.
Notes
Author | Note |
---|---|
mdeslaur | only affects Exim 4.88 or newer |
Priority
Status
Package | Release | Status |
---|---|---|
exim4 Launchpad, Ubuntu, Debian |
artful |
Released
(4.89-5ubuntu1.2)
|
trusty |
Not vulnerable
(4.82-3ubuntu2.3)
|
|
upstream |
Needs triage
|
|
xenial |
Not vulnerable
(4.86.2-2ubuntu2.2)
|
|
zesty |
Released
(4.88-5ubuntu1.3)
|
|
Patches: upstream: https://git.exim.org/exim.git/commit/178ecb70987f024f0e775d87c2f8b2cf587dd542 upstream: https://git.exim.org/exim.git/commit/4804c62909a62a3ac12ec4777ebd48c541028965 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |