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 |