CVE-2017-8819
tor - security update
7.5
HIGH
CVSS 3.1
EPSS 0.29%
Description
In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, the replay-cache protection mechanism is ineffective for v2 onion services, aka TROVE-2017-009. An attacker can send many INTRODUCE2 cells to trigger this issue.
How to fix CVE-2017-8819
To remediate CVE-2017-8819, upgrade the affected package to a fixed version below.
- —upgrade to 0.3.1.9-1 or later
- —upgrade to 0.2.5.16-1 or later
Is CVE-2017-8819 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 0.3.1.9-1
- from 0, < 0.2.5.16-1
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 |