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Fencer Vulns
low 3.7

CVE-2017-8822 json

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, relays…

published 2017-12-03 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-17765

cvss
3.7
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits
0
none known

Summary

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, relays (that have incompletely downloaded descriptors) can pick themselves in a circuit path, leading to a degradation of anonymity, aka TROVE-2017-012.

Patch / fix

  • tor_project tor 0.2.5.16, 0.2.8.17, 0.2.9.14, 0.3.0.13, 0.3.1.9
  • tor Debian 14, Debian 13, Debian 12 0.3.1.9-1

debian advisories DEBIAN-CVE-2017-8822

  • tor Ubuntu 14.04 LTS 0.2.4.27-1ubuntu0.1
  • tor Ubuntu 16.04 LTS 0.2.9.14-1ubuntu1~16.04.2

ubuntu advisories UBUNTU-CVE-2017-8822

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • tor openSUSE Tumbleweed 0.4.6.7-2.2
  • tor Package Hub 12 0.3.1.9-8.1

opensuse advisories openSUSE-SU-2024:11469-1openSUSE-SU-2017:3201-1openSUSE-SU-2017:3203-1

  • tor Arch Linux 0.3.1.9-1

arch linux advisories AVG-539

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-8822 updated

tor: Multiple vulnerabilities

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.90% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 3.7 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected products

  • n/a 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

Classification

Weakness
  • CWE-417 Communication Channel Errors

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.