CVE-2021-3978 json
Improper Preservation of Permissions in github.com/cloudflare/cfrpki/cmd/octorpki
published 2021-11-19 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-2286 , GHSA-3pqh-p72c-fj85 , GO-2022-0580
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 3%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/cloudflare/cfrpki 1.4.2
- Cloudflare octorpki v1.4.2
- cfrpki Debian 12 1.4.2-1
debian advisories DEBIAN-CVE-2021-3978
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 21 mo ago
Exploit prediction
0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/cloudflare/cfrpki | <1.4.2 |
1.4.2 |
Affected products
- Cloudflare octorpki
Classification
References
-
github.com
/cloudflare/cfrpki/security/advisories/GHSA-3pqh-p72c-fj85
web, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-3978
advisory
-
github.com
/cloudflare/cfrpki
package
Sources
- CVE List CVE-2021-3978
- GitHub Advisory GHSA-3pqh-p72c-fj85
- NVD CVE-2021-3978
- OSV GO-2022-0580
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.