Debian DLA-1513-1 : openafs security update

critical Nessus Plugin ID 117640

Synopsis

The remote Debian host is missing a security update.

Description

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.

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

We recommend that you upgrade your openafs packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected packages.

See Also

https://lists.debian.org/debian-lts-announce/2018/09/msg00024.html

https://packages.debian.org/source/jessie/openafs

Plugin Details

Severity: Critical

ID: 117640

File Name: debian_DLA-1513.nasl

Version: 1.5

Type: local

Agent: unix

Published: 9/24/2018

Updated: 8/6/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2018-16947

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:openafs-modules-source, p-cpe:/a:debian:debian_linux:libafsauthent1, p-cpe:/a:debian:debian_linux:openafs-fileserver, p-cpe:/a:debian:debian_linux:openafs-dbg, p-cpe:/a:debian:debian_linux:openafs-modules-dkms, p-cpe:/a:debian:debian_linux:libkopenafs1, p-cpe:/a:debian:debian_linux:libafsrpc1, p-cpe:/a:debian:debian_linux:openafs-doc, p-cpe:/a:debian:debian_linux:libpam-openafs-kaserver, p-cpe:/a:debian:debian_linux:openafs-kpasswd, cpe:/o:debian:debian_linux:8.0, p-cpe:/a:debian:debian_linux:openafs-dbserver, p-cpe:/a:debian:debian_linux:libopenafs-dev, p-cpe:/a:debian:debian_linux:openafs-krb5, p-cpe:/a:debian:debian_linux:openafs-client, p-cpe:/a:debian:debian_linux:openafs-fuse

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 9/21/2018

Reference Information

CVE: CVE-2018-16947, CVE-2018-16948, CVE-2018-16949