Debian DSA-4302-1 : openafs - security update

critical Nessus Plugin ID 117675

Synopsis

The remote Debian host is missing a security-related update.

Description

Several vulnerabilities were discovered in openafs, an implementation of the distributed filesystem AFS. The Common Vulnerabilities and Exposures project identifies the following problems :

- CVE-2018-16947 Jeffrey Altman reported that the backup tape controller (butc) process does accept incoming RPCs but does not require (or allow for) authentication of those RPCs, allowing an unauthenticated attacker to perform volume operations with administrator credentials.

- CVE-2018-16948 Mark Vitale reported that several RPC server routines do not fully initialize output variables, leaking memory contents (from both the stack and the heap) to the remote caller for otherwise-successful RPCs.

- CVE-2018-16949 Mark Vitale reported that an unauthenticated attacker can consume large amounts of server memory and network bandwidth via specially crafted requests, resulting in denial of service to legitimate clients.

Solution

Upgrade the openafs packages.

For the stable distribution (stretch), these problems have been fixed in version 1.6.20-2+deb9u2.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=908616

https://security-tracker.debian.org/tracker/CVE-2018-16947

https://security-tracker.debian.org/tracker/CVE-2018-16948

https://security-tracker.debian.org/tracker/CVE-2018-16949

https://security-tracker.debian.org/tracker/source-package/openafs

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

https://www.debian.org/security/2018/dsa-4302

Plugin Details

Severity: Critical

ID: 117675

File Name: debian_DSA-4302.nasl

Version: 1.4

Type: local

Agent: unix

Published: 9/25/2018

Updated: 11/20/2018

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

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

CVSS v3

Risk Factor: Critical

Base Score: 9.8

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:openafs, cpe:/o:debian:debian_linux:9.0

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

Patch Publication Date: 9/23/2018

Reference Information

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

DSA: 4302