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Test ID:1.3.6.1.4.1.25623.1.0.891513
Category:Debian Local Security Checks
Title:Debian LTS Advisory ([SECURITY] [DLA 1513-1] openafs security update)
Summary:Several security vulnerabilities were discovered in OpenAFS, a;distributed file system.;;CVE-2018-16947;;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.;;CVE-2018-16948;;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.;;CVE-2018-16949;;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.
Description:Summary:
Several security vulnerabilities were discovered in OpenAFS, a
distributed file system.

CVE-2018-16947

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.

CVE-2018-16948

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.

CVE-2018-16949

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.

Vulnerability Insight:
AFS is a distributed filesystem allowing cross-platform sharing of files
among multiple computers.

Affected Software/OS:
openafs on Debian Linux

Solution:
For Debian 8 'Jessie', these problems have been fixed in version
1.6.9-2+deb8u8.

We recommend that you upgrade your openafs packages.

CVSS Score:
7.5

CVSS Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:P

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2018-16947
Common Vulnerability Exposure (CVE) ID: CVE-2018-16948
Common Vulnerability Exposure (CVE) ID: CVE-2018-16949
CopyrightCopyright (c) 2018 Greenbone Networks GmbH http://greenbone.net

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