avahi: remote DoS via legacy unicast mDNS queries
Published Mar 3, 2009
7.8
HIGHCVSS 2.0
EPSS 2.01%
Description
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.
Affected products
No data.
- 0.6.23
No data.
Red Hat Enterprise Linux 5
avahi-0:0.6.16-9.el5_5
Fixed · RHSA-2010:0528
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | avahi-0:0.6.16-9.el5_5 | Fixed | RHSA-2010:0528 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 2.01% (0.02011) | 80.18th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.01% (0.02011) | 78.25th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.51% (0.01511) | 79.90th | v4 (v2025.03.14) |
| Dec 12, 2024 | 3.51% (0.03508) | 91.91th | v3 (v2023.03.01) |
| Jun 30, 2024 | 3.51% (0.03508) | 91.62th | v3 (v2023.03.01) |
| Mar 7, 2023 | 3.26% (0.03257) | 89.73th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
References (11)
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=517683 x_refsource_MISC
- http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00000.html vendor-advisoryx_refsource_SUSE
- http://secunia.com/advisories/38420 third-party-advisoryx_refsource_SECUNIA
- http://www.debian.org/security/2010/dsa-2086 vendor-advisoryx_refsource_DEBIAN
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:076 vendor-advisoryx_refsource_MANDRIVA
- http://www.openwall.com/lists/oss-security/2009/03/02/1 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/33946 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2009-0758 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=488314 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2009-0758
- https://www.cve.org/CVERecord?id=CVE-2009-0758
| Link | Providers | Tags |
|---|---|---|
| http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=517683 | x_refsource_MISC | |
| http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00000.html | vendor-advisoryx_refsource_SUSE | |
| http://secunia.com/advisories/38420 | third-party-advisoryx_refsource_SECUNIA | |
| http://www.debian.org/security/2010/dsa-2086 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.mandriva.com/security/advisories?name=MDVSA-2009:076 | vendor-advisoryx_refsource_MANDRIVA | |
| http://www.openwall.com/lists/oss-security/2009/03/02/1 | mailing-listx_refsource_MLIST | |
| http://www.securityfocus.com/bid/33946 | vdb-entryx_refsource_BID | |
| https://access.redhat.com/security/cve/CVE-2009-0758 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=488314 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2009-0758 | ||
| https://www.cve.org/CVERecord?id=CVE-2009-0758 |
Change history (0)
No recorded changes yet.