CVE-2019-8955
7.5
HIGH
CVSS 3.1
EPSS 1.8%
Description
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.
How to fix CVE-2019-8955
To remediate CVE-2019-8955, upgrade the affected package to a fixed version below.
- Debian/tor—upgrade to 0.3.5.8-1 or later
Is CVE-2019-8955 being exploited?
Low — EPSS is 1.8%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 0.3.5.8-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |