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8 vulnerabilities found for by avahi

CVE-2025-59529 (GCVE-0-2025-59529)
Vulnerability from cvelistv5
Published
2025-12-18 20:25
Modified
2025-12-19 22:04
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Summary
Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. In versions up to and including 0.9-rc2, the simple protocol server ignores the documented client limit and accepts unlimited connections, allowing for easy local DoS. Although `CLIENTS_MAX` is defined, `server_work()` unconditionally `accept()`s and `client_new()` always appends the new client and increments `n_clients`. There is no check against the limit. When client cannot be accepted as a result of maximal socket number of avahi-daemon, it logs unconditionally error per each connection. Unprivileged local users can exhaust daemon memory and file descriptors, causing a denial of service system-wide for mDNS/DNS-SD. Exhausting local file descriptors causes increased system load caused by logging errors of each of request. Overloading prevents glibc calls using nss-mdns plugins to resolve `*.local.` names and link-local addresses. As of time of publication, no known patched versions are available, but a candidate fix is available in pull request 808, and some workarounds are available. Simple clients are offered for nss-mdns package functionality. It is not possible to disable the unix socket `/run/avahi-daemon/socket`, but resolution requests received via DBus are not affected directly. Tools avahi-resolve, avahi-resolve-address and avahi-resolve-host-name are not affected, they use DBus interface. It is possible to change permissions of unix socket after avahi-daemon is started. But avahi-daemon does not provide any configuration for it. Additional access restrictions like SELinux can also prevent unwanted tools to access the socket and keep resolution working for trusted users.
References
Impacted products
Vendor Product Version
avahi avahi Version: <= 0.9-rc2
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2023-38473 (GCVE-0-2023-38473)
Vulnerability from cvelistv5
Published
2023-11-02 15:00
Modified
2025-11-03 21:49
Severity ?
6.2 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Summary
A vulnerability was found in Avahi. A reachable assertion exists in the avahi_alternative_host_name() function.
References
Impacted products
Vendor Product Version
n/a avahi
Show details on NVD website

To clipboard 

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CVE-2023-38472 (GCVE-0-2023-38472)
Vulnerability from cvelistv5
Published
2023-11-02 14:59
Modified
2025-11-03 21:49
Severity ?
6.2 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Summary
A vulnerability was found in Avahi. A reachable assertion exists in the avahi_rdata_parse() function.
References
Impacted products
Vendor Product Version
n/a avahi
Show details on NVD website

To clipboard 

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CVE-2023-38471 (GCVE-0-2023-38471)
Vulnerability from cvelistv5
Published
2023-11-02 14:58
Modified
2025-11-03 21:49
Severity ?
6.2 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Summary
A vulnerability was found in Avahi. A reachable assertion exists in the dbus_set_host_name function.
References
Impacted products
Vendor Product Version
n/a avahi
Show details on NVD website

To clipboard 

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CVE-2023-38470 (GCVE-0-2023-38470)
Vulnerability from cvelistv5
Published
2023-11-02 14:57
Modified
2025-11-03 21:49
Severity ?
6.2 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Summary
A vulnerability was found in Avahi. A reachable assertion exists in the avahi_escape_label() function.
References
Impacted products
Vendor Product Version
n/a avahi
Show details on NVD website

To clipboard 

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CVE-2023-38469 (GCVE-0-2023-38469)
Vulnerability from cvelistv5
Published
2023-11-02 14:49
Modified
2025-11-03 21:49
Severity ?
6.2 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Summary
A vulnerability was found in Avahi, where a reachable assertion exists in avahi_dns_packet_append_record.
References
Impacted products
Vendor Product Version
n/a avahi
Show details on NVD website

To clipboard 

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CVE-2023-1981 (GCVE-0-2023-1981)
Vulnerability from cvelistv5
Published
2023-05-26 00:00
Modified
2025-11-03 21:47
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
Summary
A vulnerability was found in the avahi library. This flaw allows an unprivileged user to make a dbus call, causing the avahi daemon to crash.
References
Impacted products
Vendor Product Version
n/a avahi Version: avahi-0.7-20
Show details on NVD website

To clipboard 

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CVE-2017-6519 (GCVE-0-2017-6519)
Vulnerability from cvelistv5
Published
2017-05-01 01:00
Modified
2025-12-03 21:57
Severity ?
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CWE
  • n/a
Summary
avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) and may cause information leakage by obtaining potentially sensitive information from the responding device via port-5353 UDP packets. NOTE: this may overlap CVE-2015-2809.
References
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

To clipboard 

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