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Servers and applications

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…

Severity
Critical 9.8
Published
6 Dec 2017
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
3.3% in the next 30 daysHigher than 88% of CVEs. EPSS by FIRST, 11 Nov 2026
Attack
Over the network · No login needed · No user action needed
Attacker can
Read data · Change data · Take it down
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Sources
NVD

Description

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.

From NVD.

Affected software

SoftwareAffected versions
rsyncServers and applications · cpe:a:samba:rsync
  • Every version up to 3.1.2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2017-17434
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2017-17434