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CVE-2017-17434

33
FAUCET Score

CVE-2017-17434 is a critical vulnerability in rsync versions 3.1.2 and 3.1.3-development, affecting Debian and Samba distributions. It allows remote attackers to bypass access restrictions due to insufficient filename checks and lack of path sanitization within the daemon. With a CVSS score of 9.8 (Critical), this vulnerability has a network attack vector, low complexity, and can lead to complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion with 10 mentions, indicating awareness and potential interest.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.1.2CPE matchmatch criteria
cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.36%
Probability of exploitation in next 30 days
EPSS Percentile
87.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-23
Model: v2026.06.15
This CVE's current EPSS score of 0.0336 is in the 80th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (3)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: rsync
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: rsync
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: rsync

Vendor Advisories (1)

redhatCVE-2017-17434Moderate

rsync: daemon does not check for fnamecmp filenames allowing for access restriction bypass

Dec 4, 2017

References

security.cucumberlinux.com / security/details.php
Third Party Advisory
git.samba.org
git.samba.org
lists.debian.org / debian-lts-announce/2017/12/msg00020.html
debian.org / security/2017/dsa-4068
Third Party Advisory