CVE-2017-17434

The daemon in rsync 3.1.2, and 3.1.3-development before 2017-12-03, does not check for fnamecmp filenames in the daemon_filter_list data structure (in the recv_files function in receiver.c) and also does not apply the sanitize_paths protection mechanism to pathnames found in "xname follows" strings (in the read_ndx_and_attrs function in rsync.c), which allows remote attackers to bypass intended access restrictions.

Published: 2017-12-06 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-17434 is rated High Risk (71.8/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 3.36%). EPSS rose +2.14% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2017-17434

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.22% 3.36% +2.14%
2 2025-03-30 3.81% 1.22% -2.59%
3 2025-03-29 — 3.81% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-17434

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2017-17434

OS Trackers for CVE-2017-17434

vendor priority summary link
alpine — CVE-2017-17434: 1 source package rows (rsync); 8 state rows across 8 repos (3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 8, open 0. https://security.alpinelinux.org/vuln/CVE-2017-17434
debian not yet assigned CVE-2017-17434 not yet assigned priority: Debian including 1 source packages (rsync), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2017-17434
gentoo normal CVE-2017-17434: 1 GLSA(s) (201801-16), 1 atom(s) (net-misc/rsync); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2017-17434
redhat medium — https://access.redhat.com/security/cve/CVE-2017-17434
suse medium CVE-2017-17434 severity moderate: SUSE including 6 source package names (rsync, rsync-3.0.4-2.48.4.1, rsync-3.0.4-2.53.3.1, rsync-3.1.0-13.13.3, rsync-3.1.0-13.7.1, rsync-3.1.3-1.19), 19 product×package rows across 16 product lines (SUSE Linux Enterprise Desktop 12 SP2, SUSE Linux Enterprise Desktop 12 SP3, … (16 product lines)): Fixed 16, Known Not Affected 3. https://www.suse.com/security/cve/CVE-2017-17434/
ubuntu medium CVE-2017-17434 medium priority: Ubuntu including 1 source packages (rsync), 5 status rows across 5 suites (artful, trusty, upstream, xenial, zesty): released 4, needs-triage 1. https://ubuntu.com/security/CVE-2017-17434

Affected software / configurations for CVE-2017-17434

Vendor Product Version Raw CPE
samba rsync <= 3.1.2 cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

References for CVE-2017-17434

cvelogic Threat Intelligence