Bug 40547 – isc-dhcp: Denial of service (3.2)

Bug 40547 - isc-dhcp: Denial of service (3.2)


Summary:	isc-dhcp: Denial of service (3.2)

Status:	CLOSED FIXED

Product:	UCS
Classification:	Unclassified
Component:	Security updates
Version:	UCS 3.2
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	UCS 3.2-8-errata
Assigned To:	Philipp Hahn
QA Contact:	Janek Walkenhorst

URL:
Keywords:

Depends on:	40545 40546
Blocks:
	Show dependency tree / graph

Reported:	2016-02-01 11:46 CET by Arvid Requate
Modified:	2016-04-06 14:35 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 11:46:26 CET

Upstream Debian package version 4.1.1-P1-15+squeeze10 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

2016-02-22 16:25:03 CET

repo_admin.py -U -p isc-dhcp -d squeeze-lts -r 3.2-0-0 -s errata3.2-8

svn cp --parents svn+ssh://billy.knut.univention.de/var/svn/patches/isc-dhcp/3.1-0-0-ucs/4.1.1-P1-15+squeeze6 svn+ssh://billy.knut.univention.de/var/svn/patches/isc-dhcp/3.2-0-0-ucs/4.1.1-P1-15+squeeze10-errata3.2-8

r15949 | Bug #40547 dhcp: "Remove unused local variables" merged in Debian by drop_unused_vars_from_ldap-c.dpatch


Package: isc-dhcp
Version: 4.1.1-P1-15.33.201602221620
Branch: ucs_3.2-0
Scope: errata3.2-8

r67612 | Bug #40547 dhcp: CVE-2015-8605
 isc-dhcp.yaml

Comment 2 Arvid Requate

2016-03-29 13:08:00 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 18:12:41 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 19:36:00 CEST

Tests (amd64): OK
Advisory: OK

Comment 5 Philipp Hahn

2016-04-06 14:35:58 CEST

<http://errata.software-univention.de/ucs/3.2/411.html>