CVE-2019-8955
Published: 21 February 2019
In Tor before 0.3.3.12, 0.3.4.x before 0.3.4.11, 0.3.5.x before 0.3.5.8, and 0.4.x before 0.4.0.2-alpha, remote denial of service against Tor clients and relays can occur via memory exhaustion in the KIST cell scheduler.
Priority
Status
Package | Release | Status |
---|---|---|
tor Launchpad, Ubuntu, Debian |
bionic |
Released
(0.3.2.10-1ubuntu0.2~esm1)
Available with Ubuntu Pro |
cosmic |
Ignored
(end of life)
|
|
disco |
Not vulnerable
(0.3.5.8-1)
|
|
eoan |
Not vulnerable
(0.3.5.8-1)
|
|
focal |
Not vulnerable
(0.3.5.8-1)
|
|
groovy |
Not vulnerable
(0.3.5.8-1)
|
|
hirsute |
Not vulnerable
(0.3.5.8-1)
|
|
impish |
Not vulnerable
(0.3.5.8-1)
|
|
jammy |
Not vulnerable
(0.3.5.8-1)
|
|
kinetic |
Not vulnerable
(0.3.5.8-1)
|
|
lunar |
Not vulnerable
(0.3.5.8-1)
|
|
trusty |
Not vulnerable
(code not present)
|
|
upstream |
Released
(0.3.5.8-1, 0.4.0.2-alpha)
|
|
xenial |
Not vulnerable
(code not present)
|
|
Patches: upstream: https://github.com/torproject/tor/commit/be84ed1a64ed7ce810bd3924fa96c2588b491ef5 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |