Vulnerability Information
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Vulnerability Title
Avahi has Uncontrolled Recursion in lookup_handle_cname function
Vulnerability Description
Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. In versions 0.9rc2 and below, avahi-daemon can be crashed via a segmentation fault by sending an unsolicited mDNS response containing a recursive CNAME record, where the alias and canonical name point to the same domain (e.g., "h.local" as a CNAME for "h.local"). This causes unbounded recursion in the lookup_handle_cname function, leading to stack exhaustion. The vulnerability affects record browsers where AVAHI_LOOKUP_USE_MULTICAST is set explicitly, which includes record browsers created by resolvers used by nss-mdns. This issue is patched in commit 78eab31128479f06e30beb8c1cbf99dd921e2524.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Vulnerability Type
未经控制的递归
Vulnerability Title
Avahi 安全漏洞
Vulnerability Description
Avahi是Avahi开源的一套用于Linux的本地服务发现工具。 Avahi 0.9rc2及之前版本存在安全漏洞，该漏洞源于发送包含递归CNAME记录的不请自来mDNS响应，可能导致分段违规和堆栈耗尽。
CVSS Information
N/A
Vulnerability Type
N/A