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.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_confirm
http://openafs.org/pages/security/OPENAFS-SA-2018-001.txt
Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2018/09/msg00024.html
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2018/dsa-4302
Scores
CVSS v3
9.8
EPSS
0.0260
EPSS Percentile
83.4%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-287
Status
published
Products (3)
debian/debian_linux
8.0
debian/debian_linux
9.0
openafs/openafs
< 1.6.23
Published
Sep 12, 2018
Tracked Since
Feb 18, 2026