CVE-2020-35680

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2020-35680
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-35680.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-35680
Downstream
Published
2020-12-24T16:15:15.600Z
Modified
2026-02-11T01:16:24.279782Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Git / github.com/openbsd/src

Affected ranges

Type
GIT
Repo
https://github.com/openbsd/src
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
6c3220444ed06b5796dedfd53a0f4becd903c0d1

Database specific

vanir_signatures 
[
    {
        "id": "CVE-2020-35680-5a2407e5",
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "146958479146620846539546414962359749417",
                "331739472224798831840993251905507474107",
                "91893901251692159920292890227734731430",
                "279425024596136944150789901713018609996",
                "302454195925576915379956718349724179184",
                "102226086405913718666762852662536102668",
                "156377891668464352413748805278213613186",
                "294224973442606065565798747585475670296"
            ]
        },
        "deprecated": false,
        "source": "https://github.com/openbsd/src/commit/6c3220444ed06b5796dedfd53a0f4becd903c0d1",
        "signature_type": "Line",
        "target": {
            "file": "usr.sbin/smtpd/lka_filter.c"
        }
    },
    {
        "id": "CVE-2020-35680-e9b83694",
        "signature_version": "v1",
        "digest": {
            "function_hash": "139574854378595409949297631104406793897",
            "length": 477.0
        },
        "deprecated": false,
        "source": "https://github.com/openbsd/src/commit/6c3220444ed06b5796dedfd53a0f4becd903c0d1",
        "signature_type": "Function",
        "target": {
            "file": "usr.sbin/smtpd/lka_filter.c",
            "function": "filter_session_io"
        }
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-35680.json"