How severe is CVE-2017-8805?

CVE-2017-8805 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2017-8805 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-8805?

CVE-2017-8805 affects Debian Ftpsync. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-8805?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2017-8805 published?

CVE-2017-8805 was published on 2017-10-17 and last updated on 2026-06-17.

CVE-2017-8805

CVE-2017-8805 is a critical-severity vulnerability in Debian Ftpsync with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Debian Ftpsync
Published: 2017-10-17
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2017-8805?: CVE-2017-8805 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2017-8805 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-8805?: CVE-2017-8805 affects Debian Ftpsync. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-8805?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2017-8805 published?: CVE-2017-8805 was published on 2017-10-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:debian:ftpsync:*:*:*:*:*:*:*:*

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