What is CVE-2021-3907?

CVE-2021-3907 is a high-severity vulnerability in Cloudflare Octorpki, classified under Improper Input Validation. CVSS score: 7.4/10. Published 2021-11-11.

How severe is CVE-2021-3907?

High severity. CVSS v3 base score is 7.4 out of 10.

Path Traversal in Cloudflare Octorpki

CVE-2021-3907

OctoRPKI does not escape a URI with a filename containing "..", this allows a repository to create a file, (ex. rsync://example.org/repo/../../etc/cron.daily/evil.roa), which would then be written to disk outside the base cache folder. This could allow for remote code execution on the host machine OctoRPKI is running on.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.041 (89.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Cloudflare Octorpki — versions unspecified
Debian Debian_linux — versions 10.0, 11.0

Weakness classification (CWE)

References

cna@cloudflare.com (Third Party Advisory, x_refsource_MISC)
cna@cloudflare.com (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
cna@cloudflare.com (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
cna@cloudflare.com (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-3907?: CVE-2021-3907 is a high-severity vulnerability in Cloudflare Octorpki, classified under Improper Input Validation. CVSS score: 7.4/10. Published 2021-11-11.
How severe is CVE-2021-3907?: High severity. CVSS v3 base score is 7.4 out of 10.