CVE-2020-35680
OpenSMTPD Denial of Service
Description
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.
INFO
Published Date :
Dec. 24, 2020, 4:15 p.m.
Last Modified :
Nov. 7, 2023, 3:22 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-35680.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-35680 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-35680 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference MITRE https://www.mail-archive.com/misc%40opensmtpd.org/msg05188.html [No types assigned] Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TYAYXRV2DM5K4RU7RHCDZSA2UF6VCTRC/ [No types assigned] Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5LKTFBQCHGMVPR4IZWHQIYAPM5J3LN3J/ [No types assigned] Removed Reference MITRE https://www.mail-archive.com/[email protected]/msg05188.html Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/5LKTFBQCHGMVPR4IZWHQIYAPM5J3LN3J/ Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/TYAYXRV2DM5K4RU7RHCDZSA2UF6VCTRC/ -
Modified Analysis by [email protected]
Sep. 02, 2022
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202105-12 No Types Assigned https://security.gentoo.org/glsa/202105-12 Third Party Advisory -
CVE Modified by [email protected]
May. 26, 2021
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202105-12 [No Types Assigned] -
Modified Analysis by [email protected]
Mar. 26, 2021
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/5LKTFBQCHGMVPR4IZWHQIYAPM5J3LN3J/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/5LKTFBQCHGMVPR4IZWHQIYAPM5J3LN3J/ Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/TYAYXRV2DM5K4RU7RHCDZSA2UF6VCTRC/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/TYAYXRV2DM5K4RU7RHCDZSA2UF6VCTRC/ Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jan. 30, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/5LKTFBQCHGMVPR4IZWHQIYAPM5J3LN3J/ [No Types Assigned] Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/TYAYXRV2DM5K4RU7RHCDZSA2UF6VCTRC/ [No Types Assigned] -
Initial Analysis by [email protected]
Dec. 29, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://github.com/openbsd/src/commit/6c3220444ed06b5796dedfd53a0f4becd903c0d1 No Types Assigned https://github.com/openbsd/src/commit/6c3220444ed06b5796dedfd53a0f4becd903c0d1 Patch, Third Party Advisory Changed Reference Type https://poolp.org/posts/2020-12-24/december-2020-opensmtpd-6.8.0p1-released-fixed-several-bugs-proposed-several-diffs-book-is-on-github/ No Types Assigned https://poolp.org/posts/2020-12-24/december-2020-opensmtpd-6.8.0p1-released-fixed-several-bugs-proposed-several-diffs-book-is-on-github/ Third Party Advisory Changed Reference Type https://www.mail-archive.com/[email protected]/msg05188.html No Types Assigned https://www.mail-archive.com/[email protected]/msg05188.html Release Notes, Third Party Advisory Added CWE NIST CWE-476 Added CPE Configuration OR *cpe:2.3:a:opensmtpd:opensmtpd:*:*:*:*:*:*:*:* versions up to (excluding) 6.8.0 *cpe:2.3:a:opensmtpd:opensmtpd:6.8.0:-:*:*:*:*:*:* *cpe:2.3:a:opensmtpd:opensmtpd:6.8.0:patch1-rc1:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-35680 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-35680
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.76 }} -0.03%
score
0.81672
percentile