CVE-2017-17434

critical

Published 2017-12-06 · Modified 2026-05-13

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CVSS v3

9.8

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

CVSS v4 NEW

—

not yet in upstream

VIR risk

9.8

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.

Predictions

Exploit likelihood

97%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

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OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Debian Mixed 7 releases

Version	Status	Fixed in
trixie	Fixed	`3.1.2-2.1`
sid	Fixed	`3.1.2-2.1`
forky	Fixed	`3.1.2-2.1`
bullseye	Fixed	`3.1.2-2.1`
bookworm	Fixed	`3.1.2-2.1`
9.0	Affected	—
8.0	Affected	—

Arch Fixed 1 release

Version	Status	Fixed in
—	Fixed	`3.1.3pre1-1`

Application impact

Vendor	Product	Versions	Fixed
samba	rsync	`{"endIncluding":"3.1.2"}`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.