CVE-2018-16947
The backup tape controller (butc) process accepts incoming RPCs but does not require (or allow for) authentication of those RPCs.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.60%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered in OpenAFS before 1.6.23 and 1.8.x before 1.8.2. The backup tape controller (butc) process accepts incoming RPCs but does not require (or allow for) authentication of those RPCs. Handling those RPCs results in operations being performed with administrator credentials, including dumping/restoring volume contents and manipulating the backup database. For example, an unauthenticated attacker can replace any volume's content with arbitrary data.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.60% probability · 85th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-287
- Affected
- openafs/openafs · debian/debian linux
- Source
- cve@mitre.org
EPSS 2.6% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://openafs.org/pages/security/OPENAFS-SA-2018-001.txtVendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/09/msg00024.htmlThird Party Advisory
- https://www.debian.org/security/2018/dsa-4302Third Party Advisory
- http://openafs.org/pages/security/OPENAFS-SA-2018-001.txtVendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/09/msg00024.htmlThird Party Advisory
- https://www.debian.org/security/2018/dsa-4302Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.