Bug 40546 – isc-dhcp: Denial of service (4.0)

Bug 40546 - isc-dhcp: Denial of service (4.0)


Summary:	isc-dhcp: Denial of service (4.0)

Status:	CLOSED FIXED

Product:	UCS
Classification:	Unclassified
Component:	Security updates
Version:	UCS 4.0
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	UCS 4.0-4-errata
Assigned To:	Philipp Hahn
QA Contact:	Janek Walkenhorst

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Keywords:

Depends on:	40545
Blocks:	40547
	Show dependency tree / graph

Reported:	2016-02-01 11:45 CET by Arvid Requate
Modified:	2016-04-06 14:04 CEST (History)
CC List:	2 users (show)

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Flags:	requate: Patch_Available+

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Description Arvid Requate

2016-02-01 11:45:19 CET

+++ This bug was initially created as a clone of Bug #40545 +++

Upstream Debian package version 4.2.2.dfsg.1-5+deb70u8 fixes this issue:

* ISC dhcp allows remote attackers to cause a denial of service (application crash) via an invalid length field in a UDP IPv4 packet (CVE-2015-8605)

Comment 1 Philipp Hahn

2016-02-23 12:34:25 CET

repo_admin.py -U -p isc-dhcp -d wheezy -r 4.0-0-0 -s errata4.0-4

r15950 | Bug #40546 dhcp: Fix patch application
r15951 | Bug #40546 dhcp: Refresh patch application
r15982 | Bug #40546 dhcp: FTBFS .NOTPARALLEL:

Package: isc-dhcp
Version: 4.2.2.dfsg.1-5+deb70u8.36.201602231227
Branch: ucs_4.0-0
Scope: errata4.0-4

r67629 | Bug #40546 dhcp: YAML 4.0-4
 isc-dhcp.yaml

Comment 2 Arvid Requate

2016-03-29 13:07:56 CEST

Another issue, maybe we can pick up the patch too if it is available in short term:

* ISC DHCP 4.1.x before 4.1-ESV-R13 and 4.2.x and 4.3.x before 4.3.4 does not restrict the number of concurrent TCP sessions, which allows remote attackers to cause a denial of service (INSIST assertion failure or request-processing outage) by establishing many sessions. (CVE-2016-2774)

Comment 3 Janek Walkenhorst

2016-03-31 18:12:27 CEST

(In reply to Arvid Requate from comment #2)
> Another issue, maybe we can pick up the patch too if it is available in
> short term:
> 
> * ISC DHCP 4.1.x before 4.1-ESV-R13 and 4.2.x and 4.3.x before 4.3.4 does
> not restrict the number of concurrent TCP sessions, which allows remote
> attackers to cause a denial of service (INSIST assertion failure or
> request-processing outage) by establishing many sessions. (CVE-2016-2774)
This is a minor issue, ignored.

Comment 4 Janek Walkenhorst

2016-03-31 19:35:53 CEST

Tests (amd64): OK
Advisory: OK

Comment 5 Philipp Hahn

2016-04-06 14:04:03 CEST

<http://errata.software-univention.de/ucs/4.0/409.html>