CVE-2017-17434 Path traversal in n/a

What is CVE-2017-17434?

CVE-2017-17434 is a critical path traversal vulnerability in Debian Debian Linux, published on 6 Dec 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Which versions are affected by CVE-2017-17434?

It affects 2 products.

Products include Debian Debian Linux, Samba Rsync.

How do I fix CVE-2017-17434?

Upgrade to a fixed version.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2017-17434 being exploited?

There is no known exploitation of CVE-2017-17434 in the wild and no public exploit code.

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• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2017-17434, DEBIAN-CVE-2017-17434, GHSA-mqj4-x9gm-m5r5, UBUNTU-CVE-2017-17434.