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CVSSv2

CVE-2020-35680

Published: 24/12/2020 Updated: 07/11/2023
CVSS v2 Base Score: 5 | Impact Score: 2.9 | Exploitability Score: 10
CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9
VMScore: 445
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
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Vulnerability Summary

smtpd/lka_filter.c in OpenSMTPD prior to 6.8.0p1, in certain configurations, allows remote malicious users 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.

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Vendor Advisories

Debian CVElist Bug Report Logs: opensmtpd: CVE-2020-35680
Debian Bug report logs - #978039 opensmtpd: CVE-2020-35680 Package: src:opensmtpd; Maintainer for src:opensmtpd is Ryan Kavanagh <rak@debianorg>; Reported by: Salvatore Bonaccorso <carnil@debianorg> Date: Thu, 24 Dec 2020 22:21:01 UTC Severity: important Tags: security, upstream Found in version opensmtpd/680p1~ ...
Arch Linux Issues:
smtpd/lka_filterc in OpenSMTPD before 680p1, 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 ...

References

CWE-476https://github.com/openbsd/src/commit/6c3220444ed06b5796dedfd53a0f4becd903c0d1https://poolp.org/posts/2020-12-24/december-2020-opensmtpd-6.8.0p1-released-fixed-several-bugs-proposed-several-diffs-book-is-on-github/https://security.gentoo.org/glsa/202105-12https://www.mail-archive.com/misc%40opensmtpd.org/msg05188.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TYAYXRV2DM5K4RU7RHCDZSA2UF6VCTRC/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5LKTFBQCHGMVPR4IZWHQIYAPM5J3LN3J/https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=978039https://nvd.nist.gov
CVSSv2
CVSSv2
CVSSv3
VMScore
Recommendations:
cross-site request forgeryCVE-2024-34351CVE-2024-1076CVE-2024-25522CVE-2024-34547CVE-2024-4644unauthorizedremoteCVE-2024-4671
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