PT-2015-5904 · Freedesktop.Org+1 · Avahi+1

Chad Seaman · Published 2015-04-01 · Updated 2025-12-03 · CVE-2015-2809

Positive Technologies (AI Summary)

CVSS v2.0

5.0

Medium

Base vector

AV:N/AC:L/Au:N/C:P/I:N/A:N

Name of the Vulnerable Software and Affected Versions Synology DiskStation Manager (DSM) versions prior to 3.1

Description The issue allows remote attackers to cause a denial of service or obtain potentially sensitive information via port-5353 UDP packets to the Avahi component. This is due to the Multicast DNS (mDNS) responder inadvertently responding to unicast queries with source addresses that are not link-local.

Recommendations For versions prior to 3.1, update to version 3.1 or later to resolve the issue. As a temporary workaround, consider restricting access to port 5353 to minimize the risk of exploitation.

Fix

DoS

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

CVE-2015-2809

Affected Products

Avahi

Synology Diskstation Manager

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2015-2809 · Security Note
• http://kb.cert.org/vuls/id/550620 · Note
• http://securityfocus.com/bid/73683 · Note
• http://kb.cert.org/vuls/id/BLUU-9TLSHD · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2809 · Note
• https://t.me/cveNotify/144687 · Telegram Post
• https://t.me/cvenotify/107331 · Telegram Post