CVE-2025-4444: A security flaw has been discovered in Tor up to 0.4.7.16/0.4.8.17. Impacted is an unknown function of the component Onion Service Descriptor Handler…

medium6.3CVSS 4.0

AVNACHATNPRNUINVCNVINVALSCNSINSANEXCRXIRXARXMAVXMACXMATXMPRXMUIXMVCXMVIXMVAXMSCXMSIXMSAXSXAUXRXVXREXUX

A security flaw has been discovered in Tor up to 0.4.7.16/0.4.8.17. Impacted is an unknown function of the component Onion Service Descriptor Handler. Performing manipulation results in resource consumption. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitability is considered difficult. Upgrading to version 0.4.8.18 and 0.4.9.3-alpha is recommended to address this issue. It is recommended to upgrade the affected component.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
debian	tor	< tor 0.4.9.6-0+deb12u1 (bookworm)	tor 0.4.9.6-0+deb12u1 (bookworm)
torproject	tor	>= 0 < 0.4.9.6-0+deb12u1	0.4.9.6-0+deb12u1
torproject	tor	>= 0 < 0.4.9.6-0+deb13u1	0.4.9.6-0+deb13u1
torproject	tor	>= 0 < 0.4.8.21-1	0.4.8.21-1

CVSS provenance

nvdv4.06.3MEDIUMCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

ghsa7.5HIGH

osv6.3MEDIUM