Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. In 0.9-rc2 and earlier, an unprivileged local users can crash avahi-daemon (with wide-area

Description

Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. In 0.9-rc2 and earlier, an unprivileged local users can crash avahi-daemon (with wide-area disabled) by creating record browsers with the AVAHI_LOOKUP_USE_WIDE_AREA flag set via D-Bus. This can be done by either calling the RecordBrowserNew method directly or creating hostname/address/service resolvers/browsers that create those browsers internally themselves.

Affected Products

References

• https://github.com/avahi/avahi/commit/ede7048475c5d47d53890e3bc1350dda8e0b3688(Patch)
• https://github.com/avahi/avahi/pull/806(Issue Tracking, Patch)
• https://github.com/avahi/avahi/security/advisories/GHSA-mhf3-865v-g5rc(Vendor Advisory)