What is CVE-2017-8805?

CVE-2017-8805 is a critical-severity vulnerability in Debian Ftpsync, classified under Path Traversal. CVSS score: 9.1/10. Published 2017-10-17.

How severe is CVE-2017-8805?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Path Traversal in Debian Ftpsync

CVE-2017-8805

Debian ftpsync before 20171017 does not use the rsync --safe-links option, which allows remote attackers to conduct directory traversal attacks via a crafted upstream mirror.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2017-10-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.030 (87.1th percentile), scored 2026-10-08.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: 0.000

Affected products

Debian Ftpsync
Debian Ftpsync Before 20171017 — versions Debian ftpsync before 20171017

Weakness classification (CWE)

CWE-22 — Path Traversal

References

www.openwall.com/lists/oss-security/2017/10/17/2 (Patch, Mailing List, Third Party Advisory, Issue Tracking)
lists.debian.org/debian-mirrors/2017/10/msg00017.html (Mailing List, Issue Tracking, Vendor Advisory)
anonscm.debian.org/cgit/mirror/archvsync.git/commit/ (Patch, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2017-8805?: CVE-2017-8805 is a critical-severity vulnerability in Debian Ftpsync, classified under Path Traversal. CVSS score: 9.1/10. Published 2017-10-17.
How severe is CVE-2017-8805?: Critical severity. CVSS v3 base score is 9.1 out of 10.