PT-2017-3764 · Avahi+5 · Avahi+5

CVE-2017-6519

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Publicado

2017-04-30

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Atualizado

2025-12-03

CVSS v2.0

9.4

Crítica

VetorAV:N/AC:L/Au:N/C:C/I:N/A:C
Name of the Vulnerable Software and Affected Versions: Avahi versions 0.6.32 through 0.7
Description: The issue is related to the avahi-daemon in Avahi, which inadvertently responds to IPv6 unicast queries with source addresses that are not on-link. This allows remote attackers to cause a denial of service (traffic amplification) and may lead to information leakage by obtaining potentially sensitive information from the responding device via port-5353 UDP packets.
Recommendations: For Avahi versions 0.6.32 through 0.7, consider disabling the avahi-daemon service as a temporary workaround to minimize the risk of exploitation. Restrict access to port 5353 to prevent UDP packets from reaching the vulnerable service.

Exploit

Correção

DoS

Origin Validation Error

Improper Access Control

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Enumeração de Fraquezas

Identificadores relacionados

ALT-PU-2019-2684
ALT-PU-2020-2452
ALT-PU-2020-2940
AZL-6322
BDU:2019-00693
CESA-2020_1176
CVE-2017-6519
MGASA-2019-0081
OPENSUSE-SU-2024:10643-1
RHSA-2020:1176
RHSA-2020_1176
USN-3876-1
USN-3876-2

Produtos afetados

Alt Linux
Astra Linux
Avahi
Centos
Red Hat
Ubuntu