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No exploitation reportedFix available

CVE-2023-29323

No exploitation reported by the sources we read.

  • Published2023-04-04
  • Fixed in7.0.0

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

ascii_load_sockaddr in smtpd in OpenBSD before 7.1 errata 024 and 7.2 before errata 020, and OpenSMTPD Portable before 7.0.0-portable commit f748277, can abort upon a connection from a local, scoped IPv6 address.

Timeline

dates in UTC
  1. 2023-04-0423:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-29323?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-29323?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Opensmtpd
BranchAffectedFixed in
7.0< 7.0.07.0.0
Openbsd
BranchAffectedFixed in
7.1= 7.1no fix published
7.2= 7.2no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • opensmtpdUbuntu:Pro:16.04:LTSall versions · no fixed version listed
  • opensmtpdUbuntu:Pro:14.04:LTSall versions · no fixed version listed
  • opensmtpdUbuntu:26.10all versions · no fixed version listed
  • opensmtpdUbuntu:26.04:LTSall versions · no fixed version listed
  • opensmtpdUbuntu:25.10all versions · no fixed version listed
  • opensmtpdUbuntu:24.04:LTSall versions · no fixed version listed
  • opensmtpdUbuntu:22.04:LTSall versions · no fixed version listed
  • opensmtpdUbuntu:20.04:LTSall versions · no fixed version listed

4 more package ranges on OSV.dev

Full record on NVD

Fix

  1. Update Opensmtpd to 7.0.0

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2023-04-04
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-c3j9-w5jx-cmmq

Frequently asked questions

What is CVE-2023-29323?

ascii_load_sockaddr in smtpd in OpenBSD before 7.1 errata 024 and 7.2 before errata 020, and OpenSMTPD Portable before 7.0.0-portable commit f748277, can abort upon a connection from a local, scoped IPv6 address.

Is CVE-2023-29323 actively exploited?

Active exploitation of CVE-2023-29323 has not been confirmed. Its EPSS score was 0.3% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-29323?

CVE-2023-29323 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record