CVE-2023-39916 Possible path traversal when storing RRDP responses

What is CVE-2023-39916?

CVE-2023-39916 is a critical path traversal vulnerability in NLnet Labs Routinator, published on 13 Sep 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

NLnet Labs’ Routinator 0.9.0 up to and including 0.12.1 as well as 0.14.0 up to and including 0.14.2 contains a possible path traversal vulnerability in the optional, off-by-default keep-rrdp-responses feature that allows users to store the content of responses received for RRDP requests. The location of these stored responses is constructed from the URL of the request. Due to insufficient sanitation of the URL, it is possible for an attacker to craft a URL that results in the response being stored outside of the directory specified for it.

Weakness: CWE-22, CWE-35

Which versions are affected by CVE-2023-39916?

2 open source packages ship an affected version, including routinator. It affects 1 product.

Products include Nlnetlabs Routinator.

How do I fix CVE-2023-39916?

Upgrade routinator to 0.12.2 or later.

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

Is CVE-2023-39916 being exploited?

There is no known exploitation of CVE-2023-39916 in the wild and no public exploit code.

Other vulnerabilities in NLnet Labs Routinator

• CVE-2026-49235 Routinator crashes on specifically crafted RRDP XML files High 8.7
• CVE-2026-49233 Routinator cache path traversal using rogue rsync URIs High 8.3
• CVE-2026-49234 Routinator crashes on specifically crafted ASN strings in the API High 8.2
• CVE-2023-39915 Crashes on parsing certain invalid RPKI objects High 7.5
• CVE-2022-3029 Fatal error on incorrect base64 data in RRDP High 7.5

Sources

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

Also known as GHSA-5rxf-fqch-7vqp.