CVE-2017-17434 Information

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.

CVSS Vector

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

Reference

http://security.cucumberlinux.com/security/details.php?id=170 https://git.samba.org/?p=rsync.git;a=commit;h=5509597decdbd7b91994210f700329d8a35e70a1 https://git.samba.org/?p=rsync.git;a=commit;h=70aeb5fddd1b2f8e143276f8d5a085db16c593b9 https://lists.debian.org/debian-lts-announce/2017/12/msg00020.html https://www.debian.org/security/2017/dsa-4068

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8