CVE-2020-35680
Published: 24 December 2020
smtpd/lka_filter.c in OpenSMTPD before 6.8.0p1, in certain configurations, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted pattern of client activity, because the filter state machine does not properly maintain the I/O channel between the SMTP engine and the filters layer.
Priority
Status
Package | Release | Status |
---|---|---|
opensmtpd Launchpad, Ubuntu, Debian |
impish |
Ignored
(end of life)
|
trusty |
Needs triage
|
|
kinetic |
Ignored
(end of life, was needed)
|
|
jammy |
Needed
|
|
bionic |
Not vulnerable
(code not present)
|
|
focal |
Needed
|
|
groovy |
Ignored
(end of life)
|
|
hirsute |
Ignored
(end of life)
|
|
upstream |
Needs triage
|
|
xenial |
Not vulnerable
(code not present)
|
|
mantic |
Needed
|
|
lunar |
Ignored
(end of life, was needed)
|
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-35680
- https://github.com/openbsd/src/commit/6c3220444ed06b5796dedfd53a0f4becd903c0d1
- https://www.mail-archive.com/misc@opensmtpd.org/msg05188.html
- https://poolp.org/posts/2020-12-24/december-2020-opensmtpd-6.8.0p1-released-fixed-several-bugs-proposed-several-diffs-book-is-on-github/
- NVD
- Launchpad
- Debian