CVE-2021-3978 HIGH

CVE-2021-3978: Improper Preservation of Permissions in github.com/cloudflare/cfrpki/cmd/octorpki

Vendor Cloudflare
Product octorpki
Weakness CWE-269
Published January 29, 2025
Last update February 12, 2025

CVSS base score

7.5/10
Attack vector Local
Attack complexity High
Privileges required Low
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H

What the vulnerability does

01Description

When copying files with rsync, octorpki uses the "-a" flag 0, which forces rsync to copy binaries with the suid bit set as root. Since the provided service definition defaults to root ( https://github.com/cloudflare/cfrpki/blob/master/package/octorpki.service ) this could allow for a vector, when combined with another vulnerability that causes octorpki to process a malicious TAL file, for a local privilege escalation.

Key dates

02Disclosure timeline

January 29, 2025 CVE published
February 12, 2025 Record updated