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gentooGentoo FoundationGLSA-201701-05
HistoryJan 01, 2017 - 12:00 a.m.

BusyBox: Denial of service

2017-01-0100:00:00
Gentoo Foundation
security.gentoo.org
17

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

0.049 Low

EPSS

Percentile

92.7%

JSON

Background

BusyBox is a set of tools for embedded systems and is a replacement for GNU Coreutils.

Description

The recv_and_process_client_pkt function in networking/ntpd.c in BusyBox allows remote attackers to cause a Denial of Service (CPU and bandwidth consumption) via a forged NTP packet, which triggers a communication loop.

Impact

A remote attacker might send a specially crafted package to a machine running BusyBox ntpd, possibly resulting in a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All BusyBox users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=sys-apps/busybox-1.25.1"
OSVersionArchitecturePackageVersionFilename
Gentooanyallsys-apps/busybox< 1.25.1UNKNOWN

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7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

0.049 Low

EPSS

Percentile

92.7%

JSON
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