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TI-2009-00723 Aliases CVE-2009-0758GHSA-g7f8-4qm9-qgg5

The originates_from_local_legacy_unicast_socket function in avahi-core/server.c in…

Priority LOW 38CWE-399Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Complete
Fix status
Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-399 and the CVSS impact.

Summary

The originates_from_local_legacy_unicast_socket function in avahi-core/server.c in avahi-daemon 0.6.23 does not account for the network byte order of a port number when processing incoming multicast packets, which allows remote attackers to cause a denial of service (network bandwidth and CPU consumption) via a crafted legacy unicast mDNS query packet that triggers a multicast packet storm.

Why it matters now

EPSS 0.02011 80th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:avahi:avahi-daemon:0.6.23:*:*:*:*:*:*:*0.6.23Vulnerableavahi
  • cpe:2.3:a:avahi:avahi-daemon:0.6.23:*:*:*:*:*:*:* Versions 0.6.23 Vulnerable ·avahi

Remediation

Red Hat 1 advisory

  • RHSA-2010:0528 Released 2010-07-13 · Red Hat rating Moderate
    avahi security update
    • Red Hat Enterprise Linux (v. 5 server) avahi-0.6.16-9.el5_5, avahi-0.6.16-9.el5_5.i386, avahi-0.6.16-9.el5_5.ia64 +41
    • Red Hat Enterprise Linux Desktop (v. 5 client) avahi-0.6.16-9.el5_5, avahi-0.6.16-9.el5_5.i386, avahi-compat-howl-0.6.16-9.el5_5 +14
    • Red Hat Enterprise Linux Desktop Workstation (v. 5 client) avahi-0.6.16-9.el5_5, avahi-compat-howl-devel-0.6.16-9.el5_5, avahi-compat-howl-devel-0.6.16-9.el5_5.i386 +8

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux (v. 5 server)Fixed RHSA-2010:0528
Red Hat Enterprise Linux Desktop (v. 5 client)Fixed RHSA-2010:0528
Red Hat Enterprise Linux Desktop Workstation (v. 5 client)Fixed RHSA-2010:0528

Timeline

  1. 2026-10-02 Threatist record created from CVE-2009-0758
  2. 2026-10-03 Alias added: GHSA-g7f8-4qm9-qgg5

References

Advisory 3

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences