Debian Security Advisory
DLA-1513-1 openafs -- LTS security update
- Date Reported:
- 21 Sep 2018
- Affected Packages:
- Security database references:
- In the Debian bugtracking system: Bug 908616.
In Mitre's CVE dictionary: CVE-2018-16947, CVE-2018-16948, CVE-2018-16949.
- More information:
Several security vulnerabilities were discovered in OpenAFS, a distributed file system.
The backup tape controller 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.
Several RPC server routines did not fully initialize their output variables before returning, leaking memory contents from both the stack and the heap. Because the OpenAFS cache manager functions as an Rx server for the AFSCB service, clients are also susceptible to information leakage.
Several data types used as RPC input variables were implemented as unbounded array types, limited only by the inherent 32-bit length field to 4GB. An unauthenticated attacker could send, or claim to send, large input values and consume server resources waiting for those inputs, denying service to other valid connections.
For Debian 8
Jessie, these problems have been fixed in version 1.6.9-2+deb8u8.
We recommend that you upgrade your openafs packages.
Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS