CVE-2021-3907

Description

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.

How to fix CVE-2021-3907

To remediate CVE-2021-3907, upgrade the affected package to a fixed version below.

• —upgrade to 1.4.2-1~deb11u1 or later
• —upgrade to 1.5.3-1~deb11u1 or later
• —upgrade to 1.5.3-1~deb11u1 or later
• —upgrade to 1.4.3 or later
• —upgrade to 1.4.4 or later
• —upgrade to 1.4.3 or later
• —upgrade to 1.4.4 or later

Is CVE-2021-3907 being exploited?

Low — EPSS is 1.9%, meaning exploitation activity has not been observed at scale.

Affected packages (7)

• from 0, < 1.4.2-1~deb11u1
• from 0, < 1.5.3-1~deb11u1
• from 0, < 1.5.3-1~deb11u1
• from 0, < 1.4.3
• from 0, < 1.4.4
• from 0, < 1.4.3
• from 0, < 1.4.4

CVSS scores

References (12)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-3907
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2021-3907
• PATCHgithub.com/cloudflare/cfrpki
• WEBgithub.com/cloudflare/cfrpki/commit/a053a808feeb3115c76b6cc263ee55598ce6e8cd